click below
click below
Normal Size Small Size show me how
Epithelial Tissue
| Type | Description |
|---|---|
| Simple Squamous | Single layer of thin, flattened cells. |
| Simple Squamous function | Diffusion + filtration |
| Simple Squamous location | Air sacs of lungs + walls of capillaries |
| Simple Cuboidal | Single layer, cube-shaped cells |
| Simple Cuboidal function | Secretion + absorption |
| Simple Cuboidal location | Lining of kidney tubules, ducts of glands, covering surface of ovaries |
| Simple Columnar | Single layer, elongated cells with their nuclei in about the same position in each cell (usually near the basement membrane) |
| Simple Columnar function | Protection, secretion, + absorption |
| Simple Columnar location | In the lining of the digestive tract + uterus |
| Stratified Squamous | Multi-layered, squamous cells, thicker tissue |
| Stratified Squamous function | Protection |
| Stratified Squamous location | Lining body cavities like the mouth + outer layer of skin |
| Stratified Cuboidal | Multiple layers, cube-like shaped |
| Stratified Cuboidal function | Protection |
| Stratified Cuboidal location | Excretory ducts of sweat glands + salivary glands |
| Stratified Columnar | Multiple layers, column shaped |
| Stratified Columnar function | Protection |
| Stratified Columnar location | Lining the eyelids, parts of male urethra, pharynx, + anus |
| Pseudostratified Columnar | Appear "stratified" but really a single layer with nuclei at various levels giving the appearance of layered cells. Usually ciliated. Contains goblet cells. |
| Pseudostratified Columnar function | Secretion + ciliated movement |
| Pseudostratified Columnar location | Lining air passages like the trachea + tubes of the reproductive system |
| Transitional Epithelium | Thick, layered cuboidal cells |
| Transitional Epithelium function | "Stretchable" tissue, also forms barrier to block diffusion |
| Transitional Epithelium location | Lining of urinary bladder |
| Apical Surface | Free surface of the tissue |
| Basal Surface | Connected to the connective tissue + anchored to the basement membrane |
| Basement Membrane | The lower surface of the epithelium |
| Avascular | No blood supply |