Lab 3 Flashcards
(57 cards)
Tissue (definition)
Group of cells with a similar structure and function
Types of tissues (4)
Epithelial, connective, muscle, & nerve
Epithelial Tissue (characteristics)
Cellularity, polarity, avascular, innervated, regenerates quickly.
Cellularity definition
a lot of cells
Polarity of Epithelial Tissue
Top:apical, bottom:basal
Avascular definition
No blood
Innervated definition
has nerve fibers
Epithelial Tissue (Classification by layers)
One layer=simple, multiple layers=stratified
How are epithelial tissues held together
by tight junctions and desmosomes
Epithelial tissue (classification by shape)
Flat=squamous, square=cuboloid, rectangular/cylindrical=columnar
Simple squamous epithelium (function)
allows passage of materials where protection is not important
Simple squamous epithelium (location)
air sacs of lungs, blood vessels, lining of heart
Simple cuboidal epithelium (function)
secretion and absorption
Simple cuboidal epithelium (location)
ducts and secretory portions of small glands
Simple columnar epithelium (function)
absorption; secretion of mucus
Simple columnar epithelium (location)
digestive tract, gallbladder,
Pseudostratified epithelium
some cells reach the top, some don’t (differing heights)
Pseudostratified epithelium (location)
trachea
Pseudostratified epithelium (function)
secretion of mucus
Transitional epithelium
squamous, cuboidal, and columnar
Stratified squamous (function)
protection
Stratified squamous (location)
mouth, vagina
Transitional epithelium (function)
expanding
Transitional epithelium (location)
bladder