Epithelial Tissue Flashcards
Define tissue
A group of cells that all do the same job
State the functions of epithelial tissues
protection
absorption
filtration
secretion
function - protection
skin protects from sunlight, bacteria + physical damage
function - absorption
lining in small intestine absorbs nutrients into blood
function - filtration
lining of kidney tubules filter waste from blood plasma
function - secretion
different glands produce perspiration, oil, digestive enzymes and mucus
State characteristics of epithelial tissues
- form continuous sheets (fit like tiles)
- apical surface
- basement membrane
- avascularity
- regenerate and repair quickly
What is apical surface?
a top surface that borders an open space
What is a basement membrane?
epithelial cells which anchor themselves to connective tissue
What is avascularity?
lacks blood vessels
nourished by connective tissue
How can you classify epithelial tissue?
cell shape
cell layers
