anatomy ch 4 lecture Flashcards
what are the four basic tissue types
epithelial
connective
muscle
nervous
epithelial tissues
sheet of cells that covers body surfaces or cavities
covering and lining epithelia
on external and internal surfaces
characteristics of epithelial tissues
polarity
specialized contacts
supported by connective tissues
avascular but innervated
regeneration
two main forms of epithelial tissue
covering and lining epithelia
glandular epithelia
main functions of epithelial tissues
protection
absorption
filtration
excretion
secretion
sensory reception
glandular epithelia
secretory tissue in glands
apical surface
upper free side, exposed to surface or cavities
basal surface
lower attached side, faces inwards toward body
attaches to basal lamina
T/F: all epithelial sheets are supported by connective tissue
true
are blood vessels found in the epithelial tissue
no
T/F: epithelial tissues are named after apical surface
true
simple epithelia
single layer thick
stratified epithelia
2+ layers thick
squamous
flattened and scale like
cuboidal
box like, cube
columbar
tall, column like
simple squamous function
allow materials to pass by
simple cuboidal function
secretion and absorption
simple columnar function
absorption, secretion of mucus, enzymes
pseudostratified columnar epithelium
appears to be multilayered, but is singer layered
secretes substances (particularly mucus)
stratified squamous
thick
protects underlying tissues
transitional epithelium
basal cells cuboidal or columnar, surface cells dome shaped/squamous like
stretches readily
endocrine gland
internally secreting
no ducts
hormones
exocrine gland
externally secreting
ducts
sweat