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Epithelium Tissues Flashcards

1
Q

What are the 3 Primitive Germ cell layers?

A

Mesoderm, Endoderm, Ectoderm

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2
Q

Which germ cell layer creates Connective and Muscular Tissue?

A

Mesoderm

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3
Q

Which germ cell layer creates Nervous Tissue?

A

Ectoderm

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4
Q

Which germ cell layer creates Epithelium?

A

All 3 germ cells

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5
Q

What do Epithelial tissues do?

A

Serve as protective layers and secrete body organs/systems

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6
Q

Describe Epithelial Tissues?

A

Formed into tightly cohesive cellular sheets, Line body surfaces i.e exocrine ducts
, Form function units of secretory glands i.e sweat

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7
Q

What are the Common attributes of Epithelial Tissue?

A

Limited intercellular space - special juntions as barriers
Single/Multiple Cell layers - form linings or coverings
Free Apical Surfaces - cells face internal lumens
Basement Membrane - attaches to underlying tissue
Mitotic Capibility -repair regenerate

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8
Q

What are the Distinctive Features of Epithelial Tissue?

A

Distinguished tissue of most organs
All vital traffic of body passes here
High capacity for regeneration

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9
Q

Describe the 2 structural characteristics of Epithelial Tissue?

A

Arrangment of cell layers - simple, stratified, pseudostratified
Cell shape - squamous,cuboidal,columnar,transitional

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10
Q

How can you Classify Simple, Stratified and Pseudostratified cells?

A

Simple- one cell thick
Stratified - many cells thick bottom layer contact with basement membrane
Pseudostratified - More than one cell thick all cells rest on basement membrane

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11
Q

Give an Example of Simple Squamous cells?

A

Alveoli and Capillaries of Lungs

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12
Q

Give an Example of Simple cuboidal cells?

A

Kidney tubule

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13
Q

Give an Example of Simple Columnar cells?

A

Small intestine

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14
Q

Give an Example of Transitional cells?

A

Only in urinary tract

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15
Q

Give an Example of Stratified squamous?

A

Oesophagus

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16
Q

Give an Example of Keratinised Stratified squamous?

A

Found in skin

17
Q

Give an Example of Pseudostratified?

18
Q

Give an Example of stratified cuboidal?

A

Sweat gland

19
Q

Give an Example of stratified columnar?

A

Salivary gland

20
Q

What is on the Basal surface of Epithelia?

A

Basement membrane - seperates underlying connective tissue, permeable filter

21
Q

What are the 2 Parts of the Basement Membrane?

A

Basal Lamina - supports sheet between epithelium and connective tissue
Basement membranre - BL plus reticular fibre layer

22
Q

What is on the Apical surface of Epithelia?

A

Microvilli - finger like extensions good for absorption

Cilia - motile extensions move mucus in one direction

23
Q

Give an Example of Microvilli?

A

Small intestine

24
Q

Give an Example of Cilia?

25
Q

What is on the Lateral Surface of Epithelia?

A

Desmosome - cadherin proteins, adhesive spots
Tight junction - nothing passes
Gap junction - spot like junction, small molecules pass

26
Q

What is Glandular Epithelium?

A

Aggregates E cells clustered together to perform secretory functions

27
Q

What are the 2 classifications of Glands?

A

Exocrine - pour products into ducts that open into lumen

Endocrine - no duct system, secrete into empty tissue spaces

28
Q

What are the 3 Secretory Mechanisms?

A

Merocrine - secretion passes from cells without damage - exocytosis
Holocrine - involves death of cell - sebaceous gland
Apocrine - apical end pinched off - mammary gland

29
Q

What is the Morphological classification of glands?

A

Simple - single tube
Compound - branched
Secretory - tubular, alveolar (grape) saccular (pouch)

30
Q

Give an Example of Simple Tubular glands?

31
Q

What does Epithelial Membranes do?

A

Thin sheets of flexible tissue line parts of body - membrane

32
Q

What are the 3 types of Epithelial membranes?

A

Mucous, Serous, Cutaneous, Synovial (only connective tissue for synovial joints)

33
Q

Describe Serous membranes?

A

Simple squamous, line closed body cavities, lubrication

34
Q

Describe Mucous Membranes?

A

Lines cavities open to outside, mucus cells

35
Q

Describe Cutaneous membranes?

A

Skin, Stratified squamous epithelium - covers outer surface of body

36
Q

Describe Synovial Membranes?

A

Joints synovial fluid - lines cavities of moveable joints

37
Q

What are the 2 Layers of Serous membranes?

A

Parietal - attaches to body wall around organ

Visceral - attaches to organs itself

38
Q

What are the 3 types of Carcinoma of Epithelial Tissue?

A

Squamous Cell Carcinoma,
Basal Cell Carinoma
Malignant melenoma

IMS (53 decks)

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