Epithelial Tissue Flashcards Preview

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Flashcards in Epithelial Tissue Deck (13)
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1

Covers...

All surfaces

2

Derived from _____________

Embryonic layers

*lines internally and externally

3

Functions (5)

Protection
Tissue absorption
Secretion
Sensory
Specialized functions

4

Epithelial histology:

Closely grouped cells with little or no _________ _________

Capable of renewal by _______

Intercellular substance

Diffusion

5

Bounded together by (2)

Avascular:

Desmosomes
Hemidesmosomes

No circulation
*near conn tissue so it's capable through diffusion

6

Unstratisfied epithelium:

Single layer of cells that lines (3 items)

Lines blood and lymph vessels, heart, lungs, kidneys = squamous

Lines glands and gland ducts = cuboidal

Lines inner enamel epithelium (IEE) = makes enamel

7

Stratisfied epithelium: (lines oral mucosa)

2 or more cell layers

Classified by surface layers (cell shape)
1
2
3
4

Squamous- keratinized(H2O proof) or nonkeratinized(not H2O proof)

Cuboidal- salivary glands

Columnar- salivary glands

transitional

8

Epithelial renewal rate and repair:

Regeneration-

Cells lost at superficial layer and produced at deepest layers.

9

Renewal rate and repair:

Oral epithelium renews faster than ____.

Gingiva; ______ days
Lining of mouth; _____ days

Skin.

4-6

10-14

10

Epithelial repair depends on...

How deep injury
How old patient

11

Basement membrane-

Thin,nonliving structure b/w epithelium and connective tissue

12

Basement membrane 2 layers:

Basal lamina- 2 layers
*lamina densa (closest to conn dark layer)
*lamina lucida (light layer)

Reticular lamina- deepest of basement membrane, collagen fibers and reticular fibers

*bm attached to epithelium

13

4 types of tissue

Epithelial
Connective
Muscle
Nerve