Week 2 Flashcards
What are the 4 MAIN tissues types
Epithelial
Connective
Muscle
Nervous
What are the special characteristics of epethial tissue
Polarity Cellularity Specialized contacts Supported by connective tissue Avascular Regeneration
Faces a free space (lumen or cavity); possesses apical and basal surfaces
Polarity
Composed mostly of cells; tightly packed; no intracellular matrix
Cellularity
Bound by special cell junctions and join cells in sheets
Specialized Contacts
possesses a basement membrane composed of the basal lamina (secreted by epithelial cells) and reticular lamina (secreted by underlying connective tissue cells)
Supported by connective tissue
no direct blood supply; cells depend on diffusion of nutrients usually from the connective tissue
Avascular
high mitotic rate
Regeneration
one cell layer thick
Simple cell arrangement
two or more cell layers thick
Stratified Cell Arrangement
all cells contact basement membrane but tissue appears stratified
Pseudostratified Arrangement
specialized for stretching, smaller cells on top of large cells
Transitional Arrangement
flat and scale-like
squamous cell shape
height=width=length/depth
Cuboidal Cell Shape
taller than wide
Columnar Cell Shape