Epithelium Flashcards
What are the four classic tissues?
Epithelium
Connective Tissue
Muscle
Nerve
Where do you find epithelium?
- All internal and external skin surfaces
- The gut canal from inner lip to anal skin
- All glands associated with internal and external surfaces
- line all blood vessels
Where did epithelium arise from?
From all three germ layers:
ecto, meso and endoderm
What is an enterocyte?
Epthelia that lines the small intestine and is a absorptive cell.
What is the purpose of microvilli?
To increase the absorptive surface area.
What kind of junctions hold together epithelial cells?
Gap junctions
Tight junctions
Adherens
Desmosomes
Hemidesmosomes
Does epithelia have blood vessels?
No epithelia is avascular.
Why are epithelial cells capable of self renewal?
Because they contain stem cells in the basal lamina (basement membrane)
What is the name of epithelium that lines blood vessels?
It is called endothelium
What kind of cells that are within epithelium that produces mucus?
Goblet Cells
What are the five layers of the epidermis?
Cher: Stratum Corneum
Likes: Stratum Lucidum
Hot: Stratum Granulosum
Sex: Stratum Spinosum
Bam: Stratum Basale
In what layer of the epidermis do cells undergo apoptosis?
In the stratum granulosum
In what layer of the epidermis do the stem cells live?
In the stratum basale
Through what kind of junctions in the epithelia does intercellular communications occur?
Gap junctions
What junction connects intermediate filaments from one cell to the intermediate filaments of another?
Desmosomes
