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Anatomy > Epithelial Tissues > Flashcards

Epithelial Tissues Flashcards

1
Q

Composition of ET

A

99% cell and very little matrix

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2
Q

tissue math equation

A

(collection of cells) + matrix they produce= Tissue

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3
Q

Epi

A

on top

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4
Q

Epithelium

A

one

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5
Q

Epithelia

A

many

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6
Q

Features/Locations of ET

A

outerskin, lines body cavities, tubes, ducts, covers organs

  • can be one cell layer or many cell layers
  • Avascular
  • tightly packed cells little matrix
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7
Q

Functions of ET

A

protection, absorption, filtration, diffusion, regenerative, secretive, and sensation.

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8
Q

Simple

A

one cell layer

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9
Q

Shapes

A

squamous, cuboidal, and columnar

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10
Q

basement membrane

A

sheet-like barrier of extracellular material between epithelial cells and underlying CT; attaches 2 layers produced by both
“Glue like”

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11
Q

Intercellular Junctions

A

tight junctions, desmosome, and Gap Junctions

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12
Q

tight junction

A

complete attachment between cells; Fused band “glue tube”

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13
Q

Demosome

A

spot attachment “dot of glue”

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14
Q

Gap Junction

A

disc with holes, passageway for small molecules

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15
Q

Simple Squamous ET

A

single layer, flattened, irregularly shaped, and fragile

fx: diffusion —resp gases

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16
Q

Endothelium (simple squamous ET)

A

line blood vessels and heart chambers

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17
Q

mesothelium

A

lines body cavities, covers organs

18
Q

Simple Cuboidal epithelium

A

lines small ducts/tubes that have a secretory fxn

fxn: excretory, secretory, and absorptive (ex. thyroid cells)

19
Q

follicle

A

chamber

20
Q

lumen

A

space inside structure

21
Q

epithelium

A

one

22
Q

epithelia

A

many

23
Q

Simple columnar epithelium

A

fxn: secretion or absorption

in- digestive and respiratory tracts associated with goblet cell
- can have projections (cilia and microvilli)

24
Q

Goblet cell

A

1 cell gland that secrete mucus

25
Q

Cilla (projection)

A

naming ex. simple cillated columnar epithelium

-they beat like windshield wipers, move materials

26
Q

Microvilli

A

form a brush boarder

this increases surface area and thus absorption

27
Q

Stratified epithelium

A

layers

worn away and replaced via mitosis in the deepest cell layer

Classified by surface cell shape

28
Q

Stratified squamous epithelium

A

variable number of layers

2 types: Keratinized and Non-keratinized

29
Q

Keratin

A

protein- provides strength and water proofing

30
Q

Keratinized cell

A
  • strong, waterproof
  • cells undergo death when being keratinized
  • outer skin
31
Q

Non-keratinized cell

A

remain alive

  • lining of tubes of oral cavity, vagina, esophagus, anal canal
  • Characteristics: moist,layered, and alive.
32
Q

Transitional Epithelium

A
  • Similar to SSE but surface cells are rounded

- capable of changing shape- allow for distention; urinary system

33
Q

Pseudostratified columnar epithelium

A

appears stratified but each cell has contact with the basement membrane

34
Q

Sensory Epithelia

A

associated with the nervous system

35
Q

Glandular Epithelia

A

Cells doing the secreting

2 types - endocrine and exocrine glands

36
Q

gland

A

cell, tissue, or organ that produces and secretes a substance for use in or elimination from the body

37
Q

Exocrine Glands

A

exo= outside crine= to sieve or separate

products go into ducts or lumen of an organ going to the outside of the body.
Ex. salivary glands, sebaceous glands , pancreas (digestive enzymes)

38
Q

Endocrine Glands

A

endo= inside
products = hormones that hit the blood
ex. thyroid gland, adrenal gland, pancreas (insulin)

39
Q

Formation of Glands

A

look at the handout
in a nutshell…
-epithelial cell can be pushed down into connective tissue
-cells pushed down can hollow out

40
Q

8 Types of ET

A
  1. Glandular Epithelia
  2. Sensory Epithelia
  3. Pseudostratified columnar epithelium
  4. Transitional Epithelium
  5. Stratified Epithelium
  6. Simple Columnar Epithelium
  7. Simple Cuboidal Epithelium
  8. Simple Squamous Epithelium

Anatomy (14 decks)

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