Term Of Histology

Friday, July 31, 2009

A band
Dark band seen in muscle which is made of the thick filaments

One of the neurotransmitters

Property of tissues with an affinity for acidic dye

Cell type in the adenohypophysis with a propensity for acidic dyes

Acinar cell
Cell lining an acinus, such as cells in a pancreatic acini

Sac-like cluster of secretory epithelial cells with a central lumen

Acoustic hair cell
Sensory cell within the organ of corti

Portion of a sperm which contains enzymes

A contractile protein that is very prevalent in muscle

Adenosine triphosphate
A molecule that stores chemical energy; often abbreviated as ATP

Fat cell

Adipose cell
Fat cell


The outer connective tissue covering of an organ, vessel or other structure

Agranular leukocyte. Leukocytes without prominent granules; specifically lymphocytes and monocytes

Alpha cell
1. Pancreatic islet cell which secrete glucagon
2. Cell type in the anterior pituitary, also called acidophil

Alveolar cell
Cell of the pulmonary alveoli

Alveolar duct
Passageway which contains alveolar sacs

Alveolar sac
Region at the end of an alveolar duct; airspace

1. Microscopic sac in the lung
2. Spherical sac

Amacrine cells
Interneurons in the retina

Cell which makes tooth enamel


A saccular swelling

Fluid filled space surrounding follicle

Apocrine gland
A type of sweat gland found in the axilla, anogenital region, external auditory meatus and eyelid

Amine precursor uptake and decarboxylation

Argentaffin cells
Also called enterochromaffin cells; found in glands of the gastrointestinal tract; stain with silver salt

Argyrophilic cell
Small granule cell or dense core granule cell

Arrector pili
Smooth muscle associated with a hair follicle

Part of the arterial tree; a small artery with a diameter less than .5mm

Star shaped cell seen in the central nervous systm; most abundant glial cell

Auerbach's plexus
Myenteric plexus; located in the muscle of the intestine between the outer longitudinal layer and inner circular layer

Plasma membrane of an axon

Single process seen in a neuron which conducts impulses away from the cell body

Axon hillock
The cone shaped region at the junction of the axon and cell body

Azurophilic granules
Granules in a neutrophil which contain peroxidase and lysosomal enzymes

B lymphocytes
Leukocytes involved in humoral immunity

Band cell
Immature neutrophil in which the nucleus has not yet become multilobulated

Barr body
Inactive, repressed X chromosome seen in the female

Basal body
Structure at the base of cilium or flagellum made of microtubules

Basal cell
Cell in the deepest layer of epithelium

Basal lamina
Thin sheet of protein underlying epithelium

Basement membrane
Thin sheet which cells rests upon

Basket cell
1. Cell in the cerebellar cortex
2. Myoepithelial cell

1. Type of granulocyte with prominent basophilic granules
2. Glandular cell in the pituitary

1. An increase number of basophils in the peripheral circulation
2. Tissues property of staining with basic dyes

Beta cell
1. Pancreatic islet cell which secretes insulin
2. Cell type in the anterior pituitary, also called basophil

Betz cells
Pyramidal cells in the motor area of the brain

Bipolar neuron
Neuron with only two processes: an axon and a dendrite

Bowman's capsule
Portion of the uriniferous tubule; double layered portion surrounding the glomeruli

Bowman's membrane
The basement membrane of the corneal epithelium

Small branch of the bronchial tree which contains no cartilage in the wall

Bruch's membrane
The inner layer of the choroid; also called lamina vitrea

Brunner's gland
Glands found in the submucosa of the duodenum which have an alkaline secretion

Brush border
Microvilli seen on the epithelial surface in the small intestine which significantly increases the absorptive surface area.

C cells
1. Parafollicular cells in the thyroid which secrete calcitonin
2. Chromophobe cells of the anterior pituitary

Canal of Schlemm
Circular canal near the junction of the cornea and sclera which allows the aqueous humor to drain from the anterior chamber

Little canals which contain the processes of an osteocyte

Canals of Hering
Small bile ducts which connect to bile ducts in the portal canal

Cancellous bone
Spongy bone; trabecular bone

Thin walled blood vessel; the exchange of products between the blood and tissue occurs in the capillary

Small pockets or indentations of cell membrane seen with pinocytosis

Cell membrane
Plasmalemma; outermost portion of of a cell

Substance found covering the roots of teeth

Central vein
Vein within the center of a liver lobule

Organelle in cells which is made of microtubles

Chief cells
1. Cells in the stomach which secrete pepsinogen
2. Cell type found in the parathyroid

Immature cartilage cell which forms cartilage

Mature cartilage cell

Pigmented layer underneath the neural retina

Chromaffin cells
Catacholamine secreting cells found primarily in the adrenal medulla

DNA and histone protein which is found in the cell nucleus

Cell type in the anterior pituitary which does not pick up stain readily

Structure visible during cell division; bar like structure of chromatin

Hair like projection found on the apical surface of some epithelium

Clara cell
Cells found in the epithelium of the lung

Protein found in connective tissue, skin, tendon, bone, and cartilage

Collecting duct
Part of the kidney which collects urine from the nephrons

Columnar cell
An epithelial cell that is taller than it is wide

Compound gland
A gland with branching ducts

Cone cell
Type of photoreceptor which is specialized for color vision

Cords of Billroth
The tissue between the splenic sinuses; also called the splenic cords

Corona radiata
Cell layer surrounding oocyte

Corpus albicans
White scar seen when the corpus luteum degenerates

Corpus luteum
Structure seen in the ovary at site of ruptured follicle; yellow body

Crypts of Lieberk├╝hn
Glands found in the epithelium of the small intestine

Cuboidal epithelium
Type of epithelium where the cells are as tall as they are wide

Cumulus oophorus
Cells which surround the ovum within the ovarian follicle

Division of the cytoplasm

The region of a cell between the nucleus and plasma membrane

The framework of a cell

Decidual cell
Cell type in the endometrial stroma

Delta cell
1. Pancreatic islet cell which secretes somatostatin
2. Gonadotrophic cell

Crescent shaped serous cell cap seen in some salivary glands

Processes extending from the neuron cell body which usually branch like a tree

Dense core granule cell
Small granule cell or argyrophilic cell

Dense irregular connective tissue
Type of connective tissue where the collagen fibers are in a haphazard arrangement

Dense regular connective tissue
Connective tissue with collagen fibers in parallel arrangement

The substance which makes up most of a tooth

The layer of skin underneath the epidermis composed primarily of dense irregular connective tissue

Descemet's membrane
Limiting layer of cornea

Type of cell junction; important juction within epithelial tissue; macula adherens

Distal convoluted tubule
DCT; part of the nephron.

Deoxyribonucleic acid; material which carries the genetic information.

Ducts of Bellini
Papillary ducts; large collecting ducts in the nephrons.

Dust cell
Phagocytic cell found in the alveoli of the lungs; also called an alveolar macrophage or an alveolar phagocyte.

Eccrine sweat gland
Sweat glands distributed over almost all the body

Elastic cartilage
A type of cartilage in which there are elastic fibers in the matrix

Elastic fiber
A type of fiber found in cartilage and connective tissue which gives the tissue elasticity

Protein found in elastic fibers

Lining of the heart

Endocrine gland
Ductless gland; secretes hormones

The process by which large particles are brought into cells

Endometrial glands
Glands found in the epithelial lining of the uterus

Lining of the uterus

Connective tissue covering a muscle fiber

Connective tissue which surrounds individual nerve fibers and associated Schwann cells

Endoplasmic reticulum
Organelle within cells; two varieties: smooth and rough

Lining of bone

Simple squamous epithelium lining the heart, blood vessels, and lymphatic vessels

Enterochromaffin cells
APUD cells with granules which are seen with chromium and sliver salts

Eosin is an acid stain which binds to and stains basic structures (or negatively charged structures)

Granuloycte; granules of this type of white blood cell take up the dye eosin

Ependymal cells
Cells which line the central cavity of the spinal cord and brain ventricles

Outer covering of the heart

The outer layer of the skin composed of stratified squamous epithelium

Connective tissue sheeth which surrounds a nerve

Epithelioreticular cells
Star shaped cells in the thymus which form a framework for lymphoctes

Basic tissue type which covers and lines body cavities and surfaces

Red blood cell

Development of erythrocytes

Hormone made by the kidney which stimulates red blood cell production

Exocrine gland
Glands that secrete onto body surfaces or into body cavities

Process by which particles are moved from the cell to the exterior

Extracellular matrix
The material in the space which is outside of cells


Pore or small opening

Fenestrated capillaries
Capillaries with pores

Cell which secetes the fibers and ground substance of connective tissue

A type of cartilage that has thick collagen fibers in the matrix

Fibrous astrocyte
Type of astrocyte more common in white matter

Finger like extensions on the fallopian tube

Whiplike extension seen on some cells and bacteria for propulsion

1. Structure within the ovary
2. Structure within thyroid gland
3. Portion of hair embedded in the skin

Formed elements
Red blood cells, white blood cells and platelets

Foot process
Pedicel; portion of a podocyte

Foreign body giant cell
Formed by the fusion of macrophages

Fundic glands
Type of gastric gland.

Fusiform cell
Spindle shaped cell.

G cells
Gastrin secreting enterochromaffin cells of the pylorus

Gut associated lymphatic tissue

Collection of neuron cell bodies found outside the CNS

Gap junction
Epithelial junction which allows for the electrical coupling of cells

Gastric glands
Glands in the stomach located in the gastric mucosa

Gastric pit
Invagination of the gastric mucosa

Germ cells
Reproductive cells eg. oocytes and spermatozoa; also called a gamete

Germinal center
Lighter staining area within a lymphoid nodule which contains proliferating B lymphoctyes

Germinal epithelium
Epithelium covering the ovary

Neuroglia; supporting cells of the nervous system

Glial cells
Interstitial cells in the pineal gland

Part of the nephron; a tuft of capillaries

Goblet cells
Unicellular mucus gland found in the intestinal tract and respiratory tract

Golgi apparatus
Cellular organelle

Golgi tendon organ
Sensory nerve ending embedded in a tendon for proprioception

Basophilic cell of the adenohypophysis which secretes FSH and LH

Graafian follicle
Mature follicle which will be ovulated

Leukocytes with prominent granules; specifically: eosinophils, basophils, and neutrophils

The production and development of granulocytes

Granulosa cells
Supporting cells lining a follicle

Granulosa lutein cells
Cells derived from granulosa cells

Great alveolar cell
Alveolar type II cell

Ground substance
Amorphous extracellular matrix of connective tissue

H band
Region in a sarcomere in the middle of the A band

Hair cells
Epithelial cells with stereocilia or kinocilia found in the vestibulocochlear system

Hair follicle
Portion of hair embedded in the epidermis

Halo cells
Cell type in the epididymus

Hassall's corpuscle
Distinctive structure seen in the medulla of the thymus

Haversian canal
Central canal in an osteon which contain blood vessels

Haversian system
Osteon; central canal and the surrounding rings

Development of blood cells

Basic tissue stain which binds to and stains nucleic acids so the nucleus of a cell stains blue

Amber-gold pigment formed by the breakdown of hemoglobin

Henle's layer
Layer in the hair follicle

Henle's loop
Hairpin region of the nephron

Hensen's cells
Supporting cell type in the spiral organ of Corti

The primary cell of the liver parenchyma

Hering's canals
Small bile ducts which connect to portal canals

Herrings bodies
Granules within axons in the neurohypophysis

Connective tissue macrophage

A branch of anatomy; microscopic anatomy

Hofbauer cell
Cell type in the placenta

Holocrine gland
A type of gland in which entire cells break apart to from the secretions of that gland

Horizontal cell
1. Retinal neuron
2. Horizontal cell of Cajal-cell of the cerebral cortex

Howship's lacunae
Hollow area underneath osteoclasts from bone resorption

Huxley's layer
Layer in the hair follicle

Hyaline cartilage
A type of cartilage with a glassy appearance

Mineral crystal of bone and teeth.

I band
Light band seen on striated muscle; isotropic band

A lymphocyte which has been stimulated by an antigen

Non living particles seen within a cell

Interalveolar septum
The tissue between two pulmonary alveoli

Intercalated disc
Cross bands seen in cardiac muscle

Intercalated ducts
Ducts lined by a simple epithelium draining a secretory unit

Intercalated neurons
Neurons between sensory and motor neurons; interneurons

Intermembranous bone
Bone which forms from direct deposit, as opposed to from a cartilagenous model

Internal elastic lamina
In arteries and arterioles, the elastic fibers at the junction of the tunica intima and tunica media

Neurons between sensory and motor neurons; the vast majority of neurons are interneurons

Internuncial neurons
Neurons between sensory and motor neurons; interneurons

Interstitial cells of Cajal
Found between the layers of smooth muscle in the GI tract involved in motility

Interstitial cells of Leydig
Cells which produce and secrete testosterone found in the interstitium of the testis

Intestinal absorptive cell
Cell with a brush border for absorption of nutrients

Intestinal glands
Tubular glands in the small intestinal mucosa

Islet of Langerhans
Cellular clusters seen in the pancreas that have an endocrine function

Isotropic band
Light band seen on striated muscle; I band

Junctional complex
Intercellular attachment

Juxtaglomerular cells
Portion of the juxtaglomerular apparatus which secretes renin

Juxtamedullary nephron
Nephron that has its glomerulus next to the base of a renal pyramid.

Nuclear division

Protein found in epidermis, hair and nails

Cell found in the epidermis of the skin which produces keratin

Keratohyaline granules
Granules seen in the stratum granulosum

Killer T cell
Type of T lymphoctye; cytotoxic T cell

Long cilia

Kohn's pores
Channels between adjacent alveoli

Kupffer cell
Hepatic macrophage

Lymphatic capillaries that are found in the villi of the small intestine

Acidophilic cells in the adenohypophysis which secrete prolactin

Small space or cavity


Lamina propria
Connective tissue layer underneath epithelium

Lamina vitrea
The inner layer of the choroid; also called Bruch's membrane

Langerhans cells
Star shaped macrophages found in the epidermis; antigen presenting cells

White blood cells. Specifically: neutrophils, lymphocytes, monocytes, eosinophils, and basophils

Leydig cells
Cells which produce and secrete testosterone found in the interstitium of the testis

Lieberk├╝hn crypts
Glands found in the epithelium of the small intestine

Cell which stores fat (often used specifically for fat storing cell in liver)

Amber or brown pigment sometimes found in older cells

Liquor folliculi
The fluid in the antrum of an ovarian follicle

Littoral cells
Lining cells seen in the spleen, lymphatic sinuses and bone marrow

Loop of Henle
Hair pin shaped region of the nephron

Luschka's ducts
Accessory cystic duct

Lymphatic follicles
Concentrated spherical aggregates of lymphatic tissue which is found in the gastrointestinal, respiratory and genitourinary systems

Lymphatic nodule
Concentrated aggregate of lymphatic tissue; found in GI, respiratory and genitourinary systems

Immature lymphocyte

Agranular leukocyte

Membrane bound organelle; suicide sac.

M line
Center of the H band in a sarcomere

Phagocytic cell derived from monocytes

Macula adherens
Type of cell junction; important juction within epithelial tissue; desmosome

Macula densa
Specialized cells in the distal convoluted tubule; part of the juxtaglomerular apparatus

Macula pellucida
Stigma; site on the surface of the ovary where oocyte rupture occurs

Mall's space
Region in liver where lymph is formed

Malpighian corpuscle
1. Renal corpuscle
2. Splenic nodule

Mucosal associated lymphatic tissue

Martinotti cell
Type of nerve cell found in the cerebral cortex

Mast cells
Connective tissue cell with granules which contain heparin and histamine

Inner portion of organ

Giant cell found in the bone marrow; fragments form platelets

Process of nuclear division during the generation of sex cell which cuts the number of chromosomes in half

Meissner's corpuscle
Tactile receptors sensitive to light touch found in the dermis

Meissner's plexus
Submucosal plexus of the gastrointestinal tract

Dark pigment formed by melanocytes

Cells in the skin at the epidermal/dermal junction which produce melanin

Membrane bone
Bone which forms from direct deposit, as opposed to from a cartilagenous model

Memory cell
Lymphocyte that has been exposed to a specific antigen so that when re-exposed to that antigen it can recognize the antigen and rapidly divide

Merkel cell
Tactile receptor in the skin

Embryonic connective tissue

Mesangial cells
Cell type seen in the glomerulus; interstitial cells

Type of epithelium which lines some internal body cavities

Cell type in granulopoiesis

Vessel which is in between arteriole and capillary

Type of neuroglia; CNS macrophages

Projections on the apical surface of some epithelial cells which increase the surface area for absorpiton

Cellular organelles which generates ATP; powerhouse of the cell

Nuclear division seen with cell division

Mixed glands
Glands which are composed of both serous cells and mucous cells

Agranular white blood cell; largest white blood cell

Mucous membrane; lining of passageways

Mucos connective tissue
Type of mesenchyme

Mucous neck cell
A type of mucous secreting cell found in the stomach

Mueller cell
Supporting cell in the retina

Multipolar cell
Cell with many processes

Muscle fiber
Muscle cell

Fatty sheeth surrounding nerve cell processes

Cell type seen in granulopoiesis

Cell line in the bone marrow

Myenteric plexus
Plexus that is between the two layers of external muscle in the GI tract; Auerbach's plexus

Myoepithelial cells
Embryologically from ectoderm; contactile cells

Longitudinal unit within a muscle fiber

Contractile protein that is very prevalent in muscle

Nail bed
Structure that the nail plate rests on

Natural killer cell
Type of lymphocyte; NK cell

The functional unit of the kidney which is composed of a glomerulus and a uriniferous tubule

Intermediate fibers of neurons

Supporting cells of the central nervous system

Outermost covering of nerve fiber; also spelled neurilemma

Nerve cell

Neurosecretory cell
Neuron which secretes a hormone

Type of white blood cell; granulocyte in which the granules show no particicular attraction for either acidic or basic dyes

Nissl bodies
Distinctive rough endoplasmic reticulum and ribosomes seen in neurons

Node of Ranvier
Area between two Schwann cells which is not covered by myelin

Nonlamellar bone
Immature bone; woven bone

Cell seen in erythropoiesis which has a compact nucleus

Region in the nucleus of a cell where ribosomal RNA production occurs

Part of the cell which contains the genetic information.

Cells which produce dentin in the tooth pulp

Olfactory mucosa
Mucosa lining parts of the nasal cavity

Glial cell in the CNS which wraps around axons to form myelin sheaths

Developing female gamete; immature ovum

Optic disc
The area of the retina that the optic nerve leaves from; responsible for the blind spot

Ora serrata
Junction between the ciliary body and the retina

Organ of Corti
Part of the cochlea; houses the auditory sensory receptors

Specialized intracellular structure

Bone forming cell

Multinucleated cell which breaks done bone matrix

Mature bone cell

Bone matrix which is unmineralized

Structural unit in mature bone consisting of concentric layers of bone lamellae around the central canal

Mature female gamete

Oxyntic cell
Also called a parietal cell. Cell found in the stomach which produces hydrochloric acid and intrinsic factor

Oxyphilic cell
One of the two main cell types found in the parathyroid gland

Oxytalan fibers
Fibers in the periodontal ligament

Pacinian corpuscle
Mechanoreceptor for pressure

Pampiniform plexus
Venous plexus found in the reproductive system

Paneth cells
Cells with prominent granules found in the deepest part of an intestinal gland

Papillary layer
Superficial layer of the dermis

Parafollicular cells
Cell type in a thyroid follicle which secretes calcitonin; also called a C cells

The functional portion of an organ

Parakeratinized epithelium
Keratinized epithelium where the cells still have their nuclei

Parietal cell
Also called a oxyntic cell. Found in the stomach; produces HCl and intrinsic factor

Pars convoluta
Distal convoluted tubule

Pars distalis
Anterior lobe of the pituitary

Pars intermedia
Intermediate lobe of pituitary

Pars nervosa
Posterior lobe of pituitary

Pars recta
Proximal straight tubule in the kidney

Pars tuberalis
Portion of adenohypophysis around infundibuluar stem

Foot process of a podocyte

Peg cells
Non-ciliated secretory cells found in the oviduct

Periarterial lymphatic sheath
PALS; cluster of lymphoctes surrounding a central artery of the spleen

Connective tissue covering which surrounds cartilage

An undifferentiated cell seen in association with some capillaries

The cell body of a nerve cell

Covering of the uterus

Connective tissue sheath surrounding muscle fascicles

Connective tissue sheath surrounding nerve fibers

Supporting tissue of the teeth

Connective tisue covering of bone

Peyer's patches
Lymphoid nodules seen in the lamina propria of the large intestine and appendix

Form of endocytosis; "cell eating''

Phalangeal cells
Supporting cells of the spiral organ

Pillar cells
Cell type found in the organ of Corti

A form of endoctyosis in which fluids enter the cell; 'cell drinking'

Cell type found in the neurohypophysis

Plasma cell
Cell derived from B lymphoctyes which secretes antibodies

Plasma membrane
The cell membrane

The cell membrane

Cell fragment in blood which is involved in clotting

Having a variety of shapes and sizes

Cell of the pulmonary alveoli

Octopus shaped cells which surround glomerular capillaries

Polychromatophilic erythroblast
Immature cell in the development of the red blood cell

Polychromatophilic erythrocyte

PMN; neutrophil

Polymorphonuclear leukocyte
PMN; neutrophil

Pores of Kohn
Channels between adjacent alveoli

Portal triad
Seen in the liver; branch of the hepatic artery, hepatic portal vein, and bile duct

Matrix of dentin

PP cells
Cells of the pancreas which secrete pancreatic polypeptide

Osteoprogenitor cell; cell which will differentiate into osteoblast

Presynaptic membrane
Region of a nerve cell abutting the synaptic cleft

Primary follicle
Follicular stage where the primary oocyte is surrounded by cuboidal cells

Primary nodule
Aggregation of small lymphocytes

Primordial follicle
Primitive follicle

Principal cell
1. Parathyroid cell which secretes parathyroid hormone
2. Cell type in the thyroid; follicular cells

Immature cell in the development of the red blood cell

Primitive cell in granulopoiesis

Prostatic concretions
Corpora amylaceae; eosinophilic bodies seen in the prostate

Proximal convoluted tubule
PCT, part of the nephron

Psammoma body
Concentric whorls seen in choroid plexus, meninges, pineal gland, and some tumors

Non permanent project of the cytoplasm of a cell

Pseudostratified epithelium
A type of epithelium where all cells touch the basement membrane yet has the appearance of being stratified

Pseudounipolar neuron
Unipolar neuron

Purkinje cells
Cell type in the cerebellum

Purkinje fibers
Specialized cardiac muscle fibers inolved in the transmission of the impulse from the atrioventricular node to the ventricles

Pyramidal cells
Neurons in the cerebral cortex with a cell body shaped like a pyramid.

Ranvier's node
Area between two Schwann cells which is not covered by myelin

Red blood cell

Red fiber
Type of muscle fiber which make up slow twitch motor units

Red pulp
Tissue in the spleen composed of splenic sinuses and splenic cords

Reinke crystals
Crystals seen in the interstitial cells of Leydig

Renal columns
Kidney tissue which is between the pyramids

Renal corpuscle
Glomerulus and Bowman's capsule

Residual body
Accumulation of indigestable matter within a cell

Respiratory bronchiole
First portion of the respiratory tract where gas exchange actually occurs

Rete ovarii
Fetal remnants within the ovary

Rete testis
Tubules within the testis

Rete peg
Regions in the skin where the stratum germinativum projects downward into the dermis


Reticular fiber
Type of fiber made of collagen

Reticular layer
Deeper region within the dermis

Immature erythrocyte (RBC); also called polychromatophilic erythrocyte

Reticuloendothelial system
Component of the immune system consisting of the phagocytic cells within the reticular connective tissue

The sensory tunic of the eye

Cytoplasmic organelle which produces proteins

Ribonucleic acid

Rod cell
Type of photoreceptors in the retina

Rokitansky-Aschoff sinuses
Diverticula seen in the mucosa of the gallbladder

Rough endoplasmic reticulum
Endoplasmic reticulum which is studded with ribosomes

Ruffini's corpuscle
Tactile receptor responsive to continuous pressure

Ruffled border
Plasma membrane foldings on an osteoclast

Plasma membrane of a muscle cell

Functional unit in a muscle cell; Z line to Z line

Cytoplasm of a muscle cell

Sarcoplasmic reticulum
The endoplasmic reticulum in a muscle cell

Satellite cells
Cells found in skeletal muscle which are dormant stem cells

Scala tympani
Chamber within the the cochlear duct

Scala vestibuli
Chamber within the the cochlear duct

Schlemm's canal
Circular canal near the junction of the cornea and sclera which allows the aqueous humor to drain from the anterior chamber

Schmidt-Lanterman cleft
Cytoplasm of a Schwann cell

Schwann cells
Cells which form the myelin sheath in the peripheral nervous system

Sebaceous gland
Gland which produces and secrete sebum

Oily secretion

Secondary follicle
Antral follicle; follicle after the fluid filled antrum forms

Seminiferous tubules
Tubules where spermatozoa mature

Septal cell
Type II alveolar cell

Lining of closed body cavities

Serous cell
Cell which secretes watery secretion containing enzymes

Serous demilune
Serous cell which is a moon shaped cap resting on a mucous secreting cell in a salivary gland

Sertoli cells
Supporting cells in the testes

Sharpey's fibers
Collagen fibers in bone; peforating fibers

Simple epithelium
Epithelium consisting of a single layer of cells

Simple gland
A gland with an unbranched duct or no duct

Wide, leaky capillary

Slit pore
Opening between the foot processes of podocytes in the kidney

Small alveolar cell
Type I alveolar cell

Small granule cell
Argyrophilic cell or dense core granule cell

Smoth endoplasmic reticulum
Endoplasmic reticulum that is not studded with ribosomes

Smudge cell
A fragmented white blood which became fragmented while making the peripheral blood smear slide

Smooth muscle
iInvoluntary muscle which does not have cross striations

Cell body of a neuron

Cell type found in the adenohypophysis which secretes growth hormone

Space of Disse
Perisinuoidal space seen in the liver

Space of Mall
Space seen in the liver at the periphery of a portal canal

Spermatogenic cell

Spermatogenic cell

Spermatogenic cell

Mature sperm cell

Trabeculae seen in spongy bone

Splenic cords
Cords of Billroth; tissue between the splenic sinuses

Spongy bone
Cancellous bone; trabecular bone

Squamocolumnar junction
Transition region between the exocervix and endocervix where the epithelium changes from stratified squamous to simple columnar


Squamous epithelium
Epithelium where the surface cells are flat; can be either simple or stratified

Immature neutrophil in which the nucleus is not yet multi-lobed; also called a band cell

Shaped like a star

Stem cell
Undifferentiate precursor cell

Very long microvilli found on some epithelial cells

Stratified epithelium
Epithelium composed of more than one layer of cells


Stratum basale
1. Basal layer of the epidermis; also called the stratum germinativum
2. Basal layer of the endometrium

Stratum corneum
Most external layer of the epidermis; also called the horny layer

Stratum functionalis
Portion of the endometrium which is shed monthly

Stratum germinativum
Basal layer of the epidermis; also called stratum basale

Stratum granulosum
Granular layer of the epidermis

Stratum lucidum
Clear layer of the epidermis; found only in thick skin

Stratum spinosum
Spiny layer of the epidermis

Stratum vasculare
Central layer in myometrium

Striated border
Visible effect of the microvilli in the small intestine; also called the brush border

Striated duct
Duct with infoldings of plasma membrane and mitochondria as to give it a striped appearance

Stria vascularis
Part of the wall of the cochlear duct

Striated muscle
Skeletal muscle and cardiac muscle

The supporting tissue in an organ, i.e the blood vessels, connective tissue, nerves, etc.

Subcapsular sinus
Space underneath a lymph node capsule

Tissue layer underneath the mucosa

Subneural clefts
Folds or gutters in the sarcolemma

Substantia propria
Layers of collagen which form the cornea

Sudoriferous glands
Sweat gland

Sustentacular cell
Supporting cell

Cell junction between neurons

Mass formed by cells which have merged with each other.

T cell
Type of lymphocyte which is involved in cellular immunity

T tubule
Invagination of the plasma membrane seen in muscle fibers which allows for rapid calcium distribution

Taste buds
Structures found on some papillae in the tongue and in mucous membrane of the pharynx

Taste pore
Opening in the taste bud

Tectorial membrane
Membrane within the cochlea of the inner ear

Tendon organ
Encapsulated nerve endings stimulated by stretching

Tenia coli
Modification of the muscularis externa of the large intestine

Terminal bouton
Rounded flask like region at the end of a neuron

Terminal bronchioles
Bronchioles just before the respiratory branch

Theca externa
Layer of connective tissue on the outer portion of the follicle; outside the theca interna

Theca folliculi
Layer of cells around a primary follicle in the ovary

Theca interna
Layer of tissue underneath the theca externa

Theca lutein cells
Peripherally located in the corpus luteum

Thick filaments
Myosin filaments

Thin filaments
Actin filaments


Thyroid follicle
Spherical collection of thyroid cells which surrounds colloid

Cell type in the anterior pituitary which secretes TSH

Tight junctions
Type of junction between epithelial cells

A group of cells working together to perform a similar function. The four primary tissue types are: epithelial, connective, muscular, nervous

Type of protein filament

Totipotential cell
Cell that is able to develop into a variety of different cell types; undifferentiated cell


Trabecular bone
Spongy bone; cancellous bone

Transitional epithelium
Type of epithelium found in the urinary tract

Transverse tubule
Invagination of the plasma membrane seen in muscle fibers which allows for rapid calcium distribution; T tubule

Outer layer on the blastocyst

Tubular gland
Gland where the secretory part is tubular

Tubuli recti
Small channels lined by sertoli cells in the testis; straight tubules

Tubuloalveolar gland
Tubular gland which has a saclike portion at the end of the tube

Tunica adventitia
Outer layer of a blood vessel which is composed primarily of connective tissue

Tunica albuginea
Tough connective tissue covering a structure

Tunica intima
Innermost layer of a blood vessel or other tubular structure

Tunica media
Middle layer of vessels composed of smooth muscle

Tunica vaginalis
Membrane around the testis

Type II alveolar cell
Cell of the pulmonary alveoli which secretes surfactant

Unilocular adipose tissue
White adipose tissue; adult adipose tissue

Unipolar neuron
Neuron with one process which immediately divides; pseudounipolar neuron

Urinary space
Space between the glomerular capillaries and Bowman's capsule

Uriniferous tubule
A component of the nephron

One of the sacs in the inner ear

Vascular tunic of the eye

An apparently empty space within a cell

Valve of Kerckring
Plica circulares

Varicose vein
Twisted, dilated vein

Vasa nervorum
Blood vessels which supply a nerve trunk

Vasa recta
Blood vessels which form a hairpin-like loop within the kidney

Venous portal system
Vein which is between two capillary beds; an example is the hepatic portal systme

Venous sinus
Large channel for venous blood

Ventricular fold
Fold of the mucous membrane in the larynx

Small vein

Vestibular membrane
Membrane within the cochlea which separates the scala media from the scala vestibuli

Fingerlike projections seen on the mucosa of the small intestine

Volkmann's canals
Channels in compact bone which run transversely

Von Ebner's glands
Serous glands associated with circumvallate papilla.

Wharton's jelly
Mucous connective tissue found in the umbilical cord

White blood cells

White fibers
Type of muscle fibers which make up fast-twitch motor units

White matter
Region of the central nervous system with abundant myelination and no cell bodies

White pulp
Lymphatic tissue of the spleen

Whole mount
Slide preparation technique using the whole specimen

Woven bone
Immature bone; non-lamelllar bone

Yellow marrow
Bone marrow consisting primarily of adipose cells

Z disc/Z line
Dark line in the center of the I band; Z line to Z line defines a sarcomere

Zona fasciculata
The middle layer of the adrenal cortex; produces glucocorticoids

Zona glomerulosa
The outer layer of the adrenal cortex where mineralocorticoids are produced

Zona pellucida
Glycoprotein coat around the oocyte

Zona reticularis
Innermost layer of the adrenal cortex; produces sex steroids

Zonula adherens
Type of junction between epithelial cells; intermediate junction

Zonula occludens
Type of junction between epithelial cells; tight junction

Zonular fibers
Suspensory ligament of the lens

Diploid cell; fertilized ovum

Zymogenic cells
Chief cells; cells which secrete enzymes.

Source: http://www.histology-world.com

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*) If you don't see a word or phrase that you think should appear here, let me know by writing some comments so that I can add it to my lexicon. Thank's.

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