ClipArt ETC
"<em>A</em>, epithelial lining wall; <em>B</em>, partition between two adjacent sacs, in which run capillaries; <em>C</em>, fibers of elastic tissues." &mdash; Blaisedell, 1904

Diagrammatic view of an air sac

"A, epithelial lining wall; B, partition between two adjacent sacs, in which run capillaries;…

Ciliated epithelium from the human trachea. Large fully formed cell. Labels: b, shorter cell; c, developing cells with more than one nucleus.

Ciliated Epithelium

Ciliated epithelium from the human trachea. Large fully formed cell. Labels: b, shorter cell; c, developing…

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

Columnar Epithelium

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

"A, columnar cells of intestine; B, polyhedral cells of the conjuctiva; C, ciliated conical cells of the trachea; D, ciliated cell of frog's mothl E, inverted conical cell of the trachea; F, squamous cell of the cavity of the mouth, seen on its broad surface; G, squamous cell, seen edgeways." &mdash; Blaisedell, 1904

Various kinds of epithelial cells

"A, columnar cells of intestine; B, polyhedral cells of the conjuctiva; C, ciliated conical cells of…

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…

Flat epithelium cells from the surface of the peritoneum. Labels: a, cell body; c, nucleus.

Flat Epithelium Cells

Flat epithelium cells from the surface of the peritoneum. Labels: a, cell body; c, nucleus.

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;…

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…

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…

"Scheme showing the essential relations of the parts of a nervous system: 1, the sensory end organ (epithelial); 2, afferent nerve tract; 3, central nervous cells (ganglia); 4, efferent nerves, leading to 5, muscle, gland, etc. g, ganglion cells; gl., gland; m, muscle fibre; n.f., nerve fibre; s.e., sensory epithelium." &mdash; Galloway

Nervous System

"Scheme showing the essential relations of the parts of a nervous system: 1, the sensory end organ (epithelial);…

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…

Squamous epithelium scales from the inside of the mouth.

Squamous Epithelium Scales

Squamous epithelium scales from the inside of the mouth.