1Covers every exposed surface of the body
epithelial tissue
2functions of epithelia
physical protection
controls permeability
provides sensation
produces speialized secretions
3characteristics of epithelia
PACAR
Polarity: presence of structural differenceson exposed/attaxched surfaces
Attachment: of base to basement membrane
Cellularity: entirely made of cell junctions
Avasularity: lacks blood vessels
Regeneration
4microvilli
increase surface area where secertion is required
5long microvilli - inner ear tract
stereocilia
6wave motion moves particles across surface
cillia
71 layer of epithelia
simple
8more than one layer of epithelia
stratified
9speudostratified (respiratory tract and male reproductive tract)
one layer but looks like multiple
10flat scale shaped epithelial cell
sqaumous
11box shaped epithelial cell
cuboidal
12tall pilar like epithelial cell
coluimnar
13transitional epithelium
changes between squamous and cuboidal shape
14cell shape of pericardial
simple squamous
15cell shape of kindney tubule
simble cuboidal
16cell shape of intestinal lining
simple columnar
17cell shape of sruface of tongue
stratified squamous
18cell shape of sweat gland duct
stratified cuboidal
19cell shape of salivary gland duct
stratified columnar
20junction that allows least amount of passage, not even water
tight junctions
21where cell is exposed to int/external environment
apical surfaces
22Base and sides of epithelia
basolateral surfaces
23base of basolateral surface
cell ataches to underlying epithelial cells or deep tissue
24sides of basolateral surfaces
cell contacts its neighbors
25encircle apical regions of cells
tight junctions
26channel proteins used in gap junctions
connexons
27form a channel by joining membrane and channel proteins
gap junctions
28allow ions to pass through
gap junctions
29go alaong with tight junctions
terminal web and adhesion belt
30isolate lumen from basal surfaces
tight junctions
31Very durable junction attached to cytoskeleton
desmosomes
32What are desmosomes made up of
Cams and proteoglycans
33small discs connected to bands of internal filaments that stabalize shape
spot desmosomes
34anchor to underlying tissue and attache cells to extracellular fillaments in basement membrane
hemidesmosomes
35What are glans made of
epithelial tissue
36organs that secrete
glands
37glands that release hormones into blood without ducts
endocrine glands
38glands that release onto epithelial surfaces through ducts (sweat/tears)
exocrine glands
39Gives basement membrane strenght
reticular lamina
40basal lamina
selective filter layer close to epithelium
41maintanence and repair of epithelial cells
continuous division of cells near basement membrane
42consist of goblet cells
unicellular cells
43shapes of glands
tubular or alcinar(flask shape) and branched
44gland with multiple ducts
compound
45serous secretion
watery solution that contains enzymes
46mucous secretion
mucins that hydrate to form mucus
47merocrine
secretion released by secretory vesicles through exocytosis
49cell releases product and explodes
holocrine
50apical cytoplasm packs w vesicles and sheds
apocrine method of secretion