Epithelial Tissue Word Scramble
|
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Term | Definition |
two types | Covering & Lining epithelium and glandular |
Covering and lining epithelium | found on free surfaces of the body such as the outer layer of skin; dips into open cavities of the digestive and respiratory tracts; lines blood vessels and the heart; covers walls of body cavities and the organs |
Glandular | makes up the glands of the body |
functions of epithelial tissue | protection, absorption, filtration, and secretion |
6 special characteristics | cellularity, specialized contacts, polarity, avascularity, basement membrane, and regneration |
Cellularity | epithelium composed almost entirely of cells; very little extracellular matrix |
Specialized contacts | adjacent cells are bound together by lateral contacts |
Polarity | has one free surface exposed to the body exterior or cavity of organ |
Avascularity | no blood vessels within; receives nourishment from underlying connective tissue |
basement membrane | epithelium rest on a basal lamina (non-living, adhesive material) which separates it from connective tissue |
Regeneration | as long as there is adequate nutrition lost cells can be replaced |
Classification of epithelia (2 criteria) | Shape of cell and number of cell layers present |
Classification on shape | Squamous, Cuboidal, columnar |
squamous | flattened, scale-like cells |
cuboidal | cells that are as tall as they are wide |
columnar | cells that are tall and column-shaped |
Classification on number of layers | simple and stratified |
Simple | consists of single layer |
stratified | consists of multiple layers of cells stacked on top of each other |
simple squamous | single layer of flattened cells; functions in diffusion and filtration (lungs, kidneys, and blood vessels) |
simple cuboidal | single layer of cube like cells; functions in secretion and absorption (kidney, small glands, and ovaries) |
simple columnar | single layer of tall cells; functions in secretion and absorption (digestive tract, bronchi, uterine tubes) |
Created by:
mchuan
Popular Anatomy sets