Epithelium Lab Flashcards
1
Q
What is the purpose of epithelium?
A
Epithelia form sheets of cells that act together as one cell to line or cover an organ and to form glands
2
Q
Some other factors about epithelia:
A
- epithelia rest on the basal lamina (it’s like a rug that designates their proper location as well as a method of attaching to the connective tissue (CT) below
- all epithelia are avascular (don’t contain blood vessels) and rely on underlying CT for nourishment, oxygen and waste removal
3
Q
Keratinized layer
A
- this is found in skin
- uppermost layer of dead cells filled with keratin
4
Q
Cilia
A
- found on the apical surface of certain epithelia
- motile
5
Q
Microvilli
A
- found on the apical surface of certain epithelia
- non-motile
- absorptive
6
Q
Stereocilia
A
- found on the apical surface of certain epithelia
- non-motile
- very long
- absorptive
7
Q
Goblet cells
A
- found interspersed amongst certain epithelia
- unicellular mucus-producing cell
8
Q
Endothelium
A
special name given to simple squamous epi lining the blood vessels
9
Q
Mesothelium
A
- special name given to simple squamous epi lining the pleural, peritoneal, and pericardial cavities
- present on organ surfaces that are exposed to these cavities
- provides lubrication
10
Q
Exocrine glands can be classified for morphology as:
A
- Simple: unbranched duct
- Compound: branched duct
- Tubular: cylindrical-shaped secretory gland; straight or coiled
- Acinar: round-shaped secretory gland
11
Q
Elastic Lamina
A
- it looks like a roller coaster in the lumen of the artery
- it acts like a rubber band to push against the high pressure blood moving through this organ
- on top of the elastic lamina, there will be endothelium lining the lumen of the artery
12
Q
Serosa
A
if the mesothelium is associated with a distinct layer of connective tissue underneath (i.e. digestive system)
