Medical Terminology Ch 3

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Medical Terminology Ch 3
2012-03-09 13:55:39
Integumentary System

skin, cellulitis
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  1. Epidermis
    • Does not have a blood supply or any connective tissue.
    • It is dependent for nourishment on the deeper layers of skin.
  2. Basal layer
    • deepest layer within the epidermis.
    • Cells in this layer continously grow and multiply
    • New cells forming push old cells toward the outer layer of epidermis
  3. Keratin
    • cells shrink, die, and become filled with a hard protein
    • These dead, overlapping keratinized cells allow the skin to act as a barrier to infection and also make it waterproof.
  4. melancytes
    produce black pigment
  5. collagen fibers
    • strong fibrous protein present in present in connective tissues
    • form a "flexible glue" that gives connective tissue its strength
  6. lipocytes
    • layer of tissue composed of fat cells
    • protects the deeper tissues of the body and acts as an insulation for heat and cold.
  7. Subcutaneous layer
    third deepest layer also called hypodermis
  8. hair root
    The deeper cells in hair root force older keratinized cells to move upward forming hair shaft.
  9. nail bed
    The nail body is connected to the tissue underneath by the nail bed
  10. Nail root
    Nails grow longer from the nail root, found at the base of the nail

    Is covered and protected by the cuticle
  11. Cuticle
    soft tissue that covers and protects the base of the nail
  12. Free edge
    is the exposed edge that is trimmed when nails become to long
  13. lunula
    light colored half moon area at the base of the nail
  14. Sebaceous glands
    • found in the dermis, secrete oil (sebum), which lubricates the hair and skin. Helps to prevent drying and cracking.
    • Secrete sebyk directly into the hair follicles rather than the duct.
    • Secretion of sebum increases during adolescence
    • Loss of sebum at old age, along with sun exposure can account with wrinkles and dry skin.
  15. apocrine glands
    • sweat glands in the pubic and underarm areas that secrete thicker sweat
    • produces odor when it comes in contact with bacteria on skin
    • What we recognize as body odor
  16. perspiration
    • contains a small amount of waste product but is normally colorless and odorless
    • Sweat glands function to cool the body as sweat evaporates
  17. sudoriferous glands
    • sweat glands
    • highly coiled glands are located in the dermis.
  18. Sweat duct
    Sweat travels to the surface of the skin in a sweat duct
  19. Sweat pore
    surface opening of a sweat duct.
  20. anhidrosis
    abnormal condition of no sweat
  21. lipectomy
    removal of fat
  22. onychectomy
    removal of nail
  23. pyogenic
    pus forming
  24. cellulitis
    A diffuse, acute infection and inflammation of the connective tissue found in the skin