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Transverse section of a bronchus. Labels: e, Epithelium (ciliated); immediately beneath it is the mucous membrane or internal fibrous layer, of varying thickness; m, muscular layer; s, m, submucous tissue; f, fibrous tissue; c, cartilage enclosed within the layers of fibrous tissue; g, mucous gland.

Section of the Bronchus

Transverse section of a bronchus. Labels: e, Epithelium (ciliated); immediately beneath it is the mucous…

Columnar epithelium consists of cells which are cylindrical or prismatic is form containing a large oval nucleus. Shown are the columnar epithelial cells from the intestinal mucous membrane of a cat. Labels: a, b, small cells of the lowest layer; c, superficial layer; d, goblet cells.

Columnar Epithelial Cells from a Cat

Columnar epithelium consists of cells which are cylindrical or prismatic is form containing a large…

"In the stomach, intestines and elsewhere the epithelial cell is obling in profile and is called columnar epithelium." — Richardson, 1906

Columnar Epithelium

"In the stomach, intestines and elsewhere the epithelial cell is obling in profile and is called columnar…

Ciliated epithelial tissue, which is covered with long waving hair-like projections (cilia). It is found in air passages, Eustachian and Fallopian tubes, and the upper part of the uterus. The cilia serve to carry secretions away.

Ciliated Epithelial Tissue

Ciliated epithelial tissue, which is covered with long waving hair-like projections (cilia). It is found…

Columnar epithelium lining a gland. It consists of conical cells laid side by side, their ends forming the surface of the membrane and is found in the stomach, intestines, and elsewhere.

Columnar Epithelial Tissue

Columnar epithelium lining a gland. It consists of conical cells laid side by side, their ends forming…

Pavement (flat) epithelium tissue, which is composed of flat scales, with nuclei of varying size and is found in the skin, serous membranes, lining of blood vessels, and many ducts.

Pavement Epithelial Tissue

Pavement (flat) epithelium tissue, which is composed of flat scales, with nuclei of varying size and…

"Mosaic appearance of epithelium." — Encyclopedia Britannica, 1893

Epithelium

"Mosaic appearance of epithelium." — Encyclopedia Britannica, 1893

"Stratified epithelium." — Encyclopedia Britannica, 1893

Epithelium

"Stratified epithelium." — Encyclopedia Britannica, 1893

"A ciliated epithelium cell." — Encyclopedia Britannica, 1893

Epithelium

"A ciliated epithelium cell." — Encyclopedia Britannica, 1893

"A striated epithelium cell." — Encyclopedia Britannica, 1893

Epithelium

"A striated epithelium cell." — Encyclopedia Britannica, 1893

"A ciliated cell with one large cilium." — Encyclopedia Britannica, 1893

Epithelium

"A ciliated cell with one large cilium." — Encyclopedia Britannica, 1893

"Sense-epithelium cell of Aurelia." — Encyclopedia Britannica, 1893

Epithelium

"Sense-epithelium cell of Aurelia." — Encyclopedia Britannica, 1893

"Portion of epithelium from the tentacle of an Actinian, showing three supporting cells and one sense cell (sc); 2, a enidoblast with enclosed nematocyst from the same specimens; 3 and 3, two forms of gland cell from the stomodaeum; 5a and 5b, epithelio-muscular cells from the tentacle in different states of contraction; 5c, an epithelio-muscular cell from the endoderm, containing a symbiotic zooxanthelia; 6, a ganglion cell from the ectoderm of the peristome." — The Encyclopedia Britannica, 1910

Epithelium

"Portion of epithelium from the tentacle of an Actinian, showing three supporting cells and one sense…

Section of stratified epithelium. Labels: c, lowermost columnar cells; P, polygonal cells above these; fl, flattened cells near the surface. Between the cells are seen intercellular channels, bridged over by processes which pass from cell to cell.

Epithelium Cells

Section of stratified epithelium. Labels: c, lowermost columnar cells; P, polygonal cells above these;…

Simple pavement epithelium. Labels: a, from a serious membrane; b, from a blood vessel. "In simple pavement epithelium, the cells form flat, many-sided plates or scales, which fit together like tiles of a mosaic pavement. It forms very smooth surfaces, and it lines the alveoli of the lungs, the heart, blood vessels, land lymphatics; the mammary ducts, the serous cavities, etc."—Kimber, 1907.

Simple Pavement Epithelium Cells

Simple pavement epithelium. Labels: a, from a serious membrane; b, from a blood vessel. "In simple pavement…

Simple columnar epithelium. Labels: a, the cells; b, intercellular substance between the lower end of cells. "The columnar epithelium is a variety of simple epithelium in which the cells have a prismatic shape, and are set upright on the surface which they cover. It is found in its most characteristic form lining the mucous membrane of the intestinal canal."—Kimber, 1907

Simple Columnar Epithelium

Simple columnar epithelium. Labels: a, the cells; b, intercellular substance between the lower end of…

Glandular epithelium with the cells set round a simple saccular gland, highly magnified. "Glandular epithelium is found in the recesses of secreting glands. The cells are of many different shapes, and are usually set round a tubular or saccular cavity, into which the secretion is poured." —Kimber, 1907

Glandular Epithelium Cells

Glandular epithelium with the cells set round a simple saccular gland, highly magnified. "Glandular…

Ciliated epithelium from the human trachea, highly magnified. Labels: a, large ciliated cell; d, cell, with two nuclei. "In ciliated epithelium the cells, which are generally columnar in shape, bear at their free extremities little hair-like processes which are agitated incessantly with a lashing or vibrating motion. These minute and delicate processes are named cilia, and may be regarded as active prolongations of the cell-protoplasm." —Kimber, 1907

Ciliated Epithelium Cells

Ciliated epithelium from the human trachea, highly magnified. Labels: a, large ciliated cell; d, cell,…

Section of the transitional epithelium lining the bladder, highly magnified. Labels: a, superficial; b, intermediate; c, deep layer of cells.

Epithelium Cells Lining the Bladder

Section of the transitional epithelium lining the bladder, highly magnified. Labels: a, superficial;…

Epithelium of the bladder. Labels: a, one of the cells of the first row; b, a cell of the second row; c, cells in situ, of first, second, and deepest layer.

Epithelium of the Bladder

Epithelium of the bladder. Labels: a, one of the cells of the first row; b, a cell of the second row;…

Epithelium of the bladder. Labels: a, one of the cells of the first row; b, a cell of the second row; c, cells in situ, of first, second, and deepest layers.

Epithelium of the Bladder

Epithelium of the bladder. Labels: a, one of the cells of the first row; b, a cell of the second row;…

The vertical section of the stratified epithelium of the cornea of a rabbit. Labels: a, Anterior epithelium showing the different shapes of the cells at various depths from the free surface; b, a portion of the substance of cornea.

Epithelium of the Rabbit's Cornea

The vertical section of the stratified epithelium of the cornea of a rabbit. Labels: a, Anterior epithelium…

"One of the simplest of the tissues in the body is called the <em>epithelium</em>, and its cells are called epithelial cells. It serves as a lining of various cavities, a covering for the surface of the body, and the essential part of various organs called glands." — Blaisedell, 1904

Cross-Section of the Epithelium

"One of the simplest of the tissues in the body is called the epithelium, and its cells are…

Deep layers of the epithelium of the bladder, showing large club-shaped cells above, and smaller, more spindle-shaped cells below each with an oval nucleus.

Deep Layer of Bladder Epithelium

Deep layers of the epithelium of the bladder, showing large club-shaped cells above, and smaller, more…

The jagged cells from the middle layers of pavement epithelium, from a vertical section of the gum of a newborn infant.

Pavement Epithelium

The jagged cells from the middle layers of pavement epithelium, from a vertical section of the gum of…

Superficial layer of the epithelium of the bladder. Composed of polyhedral cells of various sizes, each one, two, or three nuciei.

Superficial Layer of Bladder Epithelium

Superficial layer of the epithelium of the bladder. Composed of polyhedral cells of various sizes, each…

"Section through ovary of a young Mammal. The eggs (o) are seen to be formed from the epithelium. c, connective tissue of ovary; e, epithelium; f, follicle of epithelial cells in which the ova ripen; o, ova in different stages of ripeness." &mdash; Galloway

Ovary

"Section through ovary of a young Mammal. The eggs (o) are seen to be formed from the epithelium. c,…

Squamous epithelium is found arranged as a single layer of flattened cells as the pigmentary layer of the retina. Shown is the pigment cells from the retina. A, cells still cohering, seen on their surface; a, nucleus indistinctly seen. In the other cells the nucleus is concealed by the pigment granules. B, two cells seen in profile; a, the outer or posterior part containing scarcely any pigment.

Pigment Cells from the Retina

Squamous epithelium is found arranged as a single layer of flattened cells as the pigmentary layer of…

"Diagram of a portion of the ovary of Sea-urchin showing the eggs arising from the epithelium (reproductive epithelium) by constriction. e, epithelium; o, ova in different stages of growth." -Galloway, 1915

Sea Urchin Ovary

"Diagram of a portion of the ovary of Sea-urchin showing the eggs arising from the epithelium (reproductive…

"The Inner Surface of the Stomach, from which the the Epithelium has been removed, showing the Openings of Gastric Glands." &mdash; Blaisedell, 1904

Inner surface of the stomach

"The Inner Surface of the Stomach, from which the the Epithelium has been removed, showing the Openings…

"1, Portion of epithelium from the tentacle of an Actinian, showing three supporting cells and one sense cell; 2, a cnidoblast with enclosed nematocyst from the same specimen; 3 and 4, two forms of gland cell from the stomodaeum; 5a, 5b, epithelio-muscular cells from the tentacle in different states of contraction; 5c, an epithelio-muscular cell from the endoderm, containing a symbiotic zooxanthella ; 6, a ganglion cell fro mthe ectoderm of the peristome." &mdash;Encyclopedia Britannica, 1910

Tentacles

"1, Portion of epithelium from the tentacle of an Actinian, showing three supporting cells and one sense…

Section of the villus of a rat killed during fat absorption. Labels: ep, epithelium; str, striated border; c, lymph cells; c', lymph cells in the epithelium; l, central lacteal containing disintegrating lymph corpuscles

Villus of a Rat

Section of the villus of a rat killed during fat absorption. Labels: ep, epithelium; str, striated border;…