Epithelial Tissue

Cards (24)

Epithelial cells are composed of CLOSELY AGGREGATES of what with VERY LITTLE extracellular substance?
Polyhedral cells
Epithelial tissue have STRONG ADHESION and FORM what that cover the surface of the body and line its cavities?
Cellular sheets
Epi: upon
Thele: nipple
Epithelial tissue: everything that enters or leaves the body must cross this
Skin: covering and lining of surfaces
Intestines: absorption
Glands: secretion
Neuroepithelium: sensation
Myoepithelial cells: contractility
What are the 2 types of epithelial tissue?
Covering and Glandular
Covering epithelia: tissues in cells which are organized in layers that cover the external surface or line the cavities of the body
Covering epithelia: classified according to the number of cell layers and the morphologic features of the cells in the surface layer
Glandular epithelia: tissues formed by cells specialized to produce secretion
Glandular epithelia synthesizes, store, and secretes what? (3)
Proteins and lipids or complexes of carbohydrates
What are the 2 types of Glandular Epithelia?
Endocrine and Exocrine
Exocrine gland: retain their continuity with the surface via DUCT
Endocrine glands: LOSE the direst continuity with the surface when their ducts degenerate during development
Simple: 1 layer
Stratified: 2 or more layers
Squamous: thin cells
Cuboidal: cell width and thickness are similar
Columnar: cells TALLER than they are wide
Pseudostratified: "false" stratified