A & P EXAM 2

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Author:
ChapinJeanie
ID:
173399
Filename:
A & P EXAM 2
Updated:
2012-09-25 19:22:39
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Tissue epithelial CHAPTER
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I. Tissues and the Living Fabric EPITHELIAL TISSUE
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  1. Tissue
    A group of closely associated cells working toward a common goal
  2. Types of Epithelial tissue
    • 1. Covering and lining
    • 2. Glandular
  3. Glandular Tissue
    Epithelial tiusse that forms glands of the body
  4. Covering and lining Tissue
    • on the free suface of the body
    • associaged with skin and ventral cavity membrane
  5. Special characteristics of Epithelial tissue
    • 1. Cellularity
    • 2. Specialized contacts
    • 3. Polarity
    • 4.Supported by connective tissue
    • 5. Avascular but innervated
    • 6. Regeneration
  6. Epithelial tissue Cellulartiy Characteristic 
    consists of closely packed cells
  7. Epithelial tissue Specialized contacts
    cells fit together for form sheets
  8. Epithelial tissue Polarity
    • posses two different surfaces
    •    1. Apical surface
    •     2. Basal surface
  9. Apical polar surface
    • upper (free) exposed surface
    • always facing something like organ
  10. Basal Polarity Surface
    • lower attached surface
    • sits on connective tissue
  11. Epithelial supported by connective tissue
    which typically have good blood supply
  12. Epithelial tissue avasular but innervated
    • No blood supply
    • Good nerve supply
  13. Epithelial Regeneration
    high rate of cell division
  14. Classification of Epithelia
    • 1. Shape
    • 2. Number of layer
    • 3. Glandular
  15. Epithelia cell shape classification
    • 1.Squamous
    • 2.Cuboidal
    • 3. Columnar
  16. Epithelia cell shape Squamous
    • thin and flat
    • looks like a fried egg
    • easliy manipulated
  17. Epithelia cell shape Cuboidal
    shaped like tiny sugar cubes
  18. Epithelia cell shape Columnar
    • shaped like tiny columns
    • has microvilli
    • typically nucleus on bottom
  19. Epithelial number of layers Classification
    • 1. Simple epithelia
    • 2. Stratified epithelia
  20. Classification of layer Simple epithelia
    • 1. Simple squamous
    • 2. Simple cuboidal
    • 3. Simple Columnar/Pseudostratified Columnar
  21. Simple squamous cells
    • areas of diffusion-lungs
    • sheet rapped in a circle (ex. around an air sac)
  22. SImple cuboidal Classification of layer
    • not tall
    • not flat
    • glands and ducts
    • looks like a circle of cells around a gland or a duct, outside the circle is connective tissue or other cells
  23. Simple columnar Classification of layer
    • 1.Goblet cells the produce mucus (lube)
    • 2. Microvilli to increase surface area (digestion)
    • 3. Cilia to move things (resptory system)
  24. Pueudostratified columar Classification of layers
    • Simple= one row
    • many times all you can see in the nucleus
    • barriers can be hard to see
  25. What defines cell
    outter most layer
  26. Classification of layers Stratified epithelia
    two or more layers of cells, named for the shape of its outter layer
  27. Different Classifications of Stratified epithelia
    • 1. Stratified Squamous
    • 2. Stratified Cuboidal
    • 3. Stratified columnar
    • 4. Transitional
  28. Stratified squamous
    • protetive areas
    • 20-30 rows
    • more blood supply is at basal level than apical level
    • top row of cells mostly dead, hair and skin
    • found in Tonge, Mouth, and Pharynx (throat)
    • KERATINIZED
  29. Keratinized (stratified squamous)
    • Contains keratin
    • waterproofing or resistant 
    • skin ONLY
  30. Stratified cuboidal
    • rare
    • typically only two layers deep
    • look for large duct
  31. Stratified Columnar
    • Rare 
    • a few rows at most 3 layers
    • digestive tract
  32. Transitional (stratified)
    • allows stretching
    • dome shaped
    • BLADDER

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