Unit 2 flash cards- skin

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Anonymous
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236037
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Unit 2 flash cards- skin
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2013-09-20 15:10:38
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unit 2
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  1. integument
    skin
  2. skin and its accessory organs, example- the hair, nails, and cutaneous glands
    integumentrary system
  3. 2 layers of skin
    • epidermis
    • dermis
  4. made of stratified squamous epithelium, 5 layers
    epidermis
  5. made of connective tissue
    dermis
  6. functions of skin
    • resistance to trauma and infection
    • barrier
    • need for absortion
    • thermoregulation
    • social function
    • cutaneous absorption
  7. cells of the epidermis
    • karatinocytes
    • stem cells
    • melanocytes synthesize melanin
    • tactile or merkel cell
    • dendritic cell
  8. 5 layers of the epidermis
    • 1. stratum basal
    • 2. stratum spinosum
    • 3. stratum granulosum
    • 4. stratum lucidum
    • 5.stratum corneum
  9. -dermal- epidermal junction
    -barrer to cell and large molecules
    basebem membrane
  10. -made of collogen, elastic, and reticular fiber, fibroblasts
    -blood vessels, sweat gland, sebaceous glands, nerve endings
    smooth muscles called pilorector muscles
    dermis
  11. 2 layers of dermis
    • papillary layer
    • reticular layer
  12. single layer of cuboidal or low columnar stem cells and kaeratinocytes sitting on basement membrane
    stratum basale
  13. several layers of karatinocytes thick erich in RNA for keratin production
    stratum spinosum
  14. 3-5 layers of flat keratinocytes
    contains keranohyalin granules
    -produces lipid filled vessicles that release a glycolipid and exocytosis to water proof skin
    stratum grulosum
  15. keratinociytes are packed with eleidin, a precursor to keratin
    stratum lucidum
  16. up to 30 layers of dead cells
    stratum corneum
  17. two types of melanin and their pigment
    • eumelanin-brownish black
    • pheomelakin- reddish yellow sulfur containing pigment
  18. red pigment of red blood cells
    hemoglobin
  19. yellow pigment of vegitable and egg yolk
    cerotene
  20. blueness resulting from deficiency of oxygen
    cyanosis
  21. redness due to dilatied cutaneous vessels
    erythema
  22. yellowing of skin and sclera due to excess of billifubin in blood
    jaundice
  23. known as subustaneous tissue or superficial fascia
    hypodermis
  24. -energy reservoir
    -thermal insulation
    -hypodermic injections
    hypodermis
  25. the boundary between the papillary and reticular layers is often vague
    reticular layers

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