dr.v test

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Anonymous
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93225
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dr.v test
Updated:
2011-07-06 23:06:52
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dr test
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integumentary anat&phys test 2
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  1. Integumentary system
    Consists of skin hair nails and cutaneous glands
  2. Epidermis
    is stratified squamous epithelium
  3. Hypodermis
    • another connective tissue layer below the dermis
    • more areolar and adipose than dermis
    • binds skin to underlying tissues
    • drugs introduced by injection
  4. Epidermis
    keratinized stratified squamous epithelium –dead cells at the surface packed with tough protein – keratin
  5. Stratum Basale
    a single layer of cuboidal to low columnar stem cells and keratinocytes resting on the basement membrane –melanocytes and tactile cells are scattered among the stem cells and keratinocytes
  6. Stratum Spinosum
    • consists of several layers of keratinocytes
    • thickest stratum in most skin
    • dendritic cells found throughout this stratum
  7. Stratum Lucidum
    thin translucent zone
  8. Stratum Corneum
    • up to 30 layers of dead, scaly, keratinized cells
    • resistant to abrasion, penetration, and water loss
  9. Dermis
    • connective tissue layer beneath the epidermis
    • hair follicles and nail roots are embedded in dermis
  10. reticular layer
    deeper and much thicker layer of dermis
  11. hair
    consists of a bulb, shaft and root
  12. hair cycle
    • anagen-growth stage 90% of scalp follicles at any given time
    • catagen - degenerative stage - mitosis in the hair matrix ceases and sheath cells below the bulge die
    • telogen - resting stage - when papilla reaches the bulge
  13. types connective tissues
    • ´╗┐bone
    • blood
    • cartilige
    • connective tissue
  14. classes of epithelium
    • simple
    • pseudostrafied columnar
    • stratified
  15. epithelial tissue
    a flat sheet of closely adhering cells , one or more cells thick, with the upper surface usually exposed to environment or to external space of the body.
  16. cell shapes
    • squamous
    • cubodial
    • columnar
  17. simple epithelia
    has one layer of cells
  18. pseudostratified columnar
    shorter cells are covered over by taller ones, epithelium looks startified but every cell reaches basement membrane
  19. goblet cell
    wineglass shaped mucus that is secreted
  20. stratified epithelium
    ranges from 2-20 or more layers of cells with cell resting directly on each other and only depest layer is attached to basement membrane

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