Histo Lec 1

Front 1

4 basic tissues

Back 1

1) Epithelium (covering,lining, secretion)

2)Connective tissue (Support, protection)

3)Muscle (movement)

4)Nerve (transmition of nerve impulse)

Front 2

Organs' cells

Back 2

1)parenchyma-composed of cells responsible for main func.

2)Stroma-supporting tissue, composed of conn. tissue(except brain/spinal cord)

Front 3

epithelial gen characteristics

Back 3

1)closely aggreg. polyhedral cells w/
very little Extracell subst.
-strong adhesion to eachother

2)form continuous sheets or discrete clusters

3)Rests on basement membrane

4)little extracell matrix

5)lacks direct vascular supply

6)may form exocrine or endocrine glands

Front 4

epith. funcs.

Back 4

protecion
sensory reception
secretion
excretion
lubrication
absorption
reproduction

Front 5

epithelial classification methods

Back 5

-number of cell layers
-shape of most superficial cells
-special secretions and surface modifications

Front 6

# of cell layers classes

Back 6

-one layer = simple
-two or more layers = stratified
-all cells on basal lamina, but not all reach surface = pseudostratified
-variable #(3-6) of layers=transitional

Front 7

classes-shapes of sup. cells

Back 7

flat = squamous
rounded,hexagon,polygonal=cuboidal
tall,cylindrical=columnar

Front 8

classes-special secret/surf mods

Back 8

-secret mucous=goblet cells, mucous epithelium (intest,stomach)

-accum protect. layer of keratin = keratinized epithelium (skin)

-Surface mods:
junctional complexes(most epith)
Microvilli: striated or brush border
(small intestine)
cilia: ciliated epith (trach, bronch)