HAP Vocab Week 2

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HAP Vocab Week 2
2011-07-13 00:42:49

Week 2
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  1. Subcutaneous Layer
    consists of areolar and adipose tissue, serves as storage for fats abd contains large blood vessels that supply skin
  2. Stratum Basale
    deepest layer of epidermis, contains single row of cuboidal or columnar keratinocytes, some stem cells that undergo cell division to produce new keratinocytes
  3. Stratum Spinosum
    Above Basale, layer 4, contains 8 to 10 layers of keratinocytes, thesew shrink and pull apart, thornlike
  4. Stratum Granulosum
    about middle of epidermis, 3 to 5 layers of keratinocytes, flat, undergoing apoptosis, little grains, darkly stained granules of protein keratohyalin
  5. Stratum Lucidum
    present only in thick skin, 3 to 5 layers flattened clear dead keratinocytes
  6. Stratum Corneum
    25 to 30 layers flattened dark keratinocytes, continuously shed and replaced
  7. Epidermis
    keratinized stratified squamous epithelium, 4 types cells, keratinocytes, melanocytes, Langerhans cells, and Merkel cells
  8. Keratin
    tough fibrous protein protects skin and tissue from heat, microbes and chemicals
  9. Melanocytes
    8% epidermal cells, produce pigment melanin,
  10. Keratinocytes
    90% epidermal cells, arranged in 4 or 5 layers produce keratin
  11. Pacinian Corpuscle
    oval pressure receptor in dermis, lamellated corpuscle
  12. Free Nerve endings
    dendrites that lack any structural specialization
  13. Dermis
    Consisting of strong connective tissue
  14. Dermal Papillae
    small fingerlike structures project into the epidermis
  15. Nevus
    mole, overgrowth of melanocytes
  16. Hair Follicle
    surround hair root, made of external and internal root sheath
  17. Arrector Pili
    dermis to hair root, goosebumps
  18. Sebaceous Gland
    oil glands, connected to hair follicles
  19. Deep Wound Healing
    wound to dermis and subcutaneous layer
  20. Inflammatory Phase
    blood clot forms in wound and loosely closes wound
  21. Migratory Phase
    clot becomes scab, epithelial cells migrate beneath wound to bridge wound
  22. Proliferative Phase
    Growth of epithelial cells beneath scab,
  23. Maturation Phase
    Scab goes away once epidermis is back to normal thickness
  24. Hypertrophic Scar
    raised scar within boundaries of original wound