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Chapter 5 (5.7 (Sebacious oil glands (oil glands are holocrine glands that…

- - - - sweat gland that secretes the product in hair follicle
      - when puberty occurs the glands become sticky, cloudy, and odurous
    - - tubular glands that discharge their secretions directly onto the surface of the skin
- - - - originates from stratum germinativum in the basal layer
    - - less common
      - involve more superficial layer
      - most people survive these cancers
      - treatment involves surgical removal of the tumor
    - - extremely dangerous
      - begins from moles appear anywhere on the body
- - - - Thick skin
        
        found on palms of hands
        
        soles of feet
        
        contains a total of 5 layers
      - Thin
        
        covers the rest of the body
        
        only 4 layers
    - - attached to the basement membrane
      - deepest epidermal layer
    - - 3 layers
      - progressively displaced from basal layer
      - outer protective barrier of skin
    - - most superficial layer
      - consists of 15-30 layers
      - accumulate large amounts of keratin
- - - - carotene
        
        orange-yellow pigment accumulates in epidermal cells
      - melanin
        
        brown yellow pigment or black produced by melanocytes
      - meanocytes
        
        Manufacture and store melanin within intracellular vesicles
      - UV
        
        Rays sent off by the sun and can cause sunburn on skin
    - - blood with abundant oxygen is bright red
      - cyanosis
        
        when the skin takes a bluish coloration
- - - - named after the dermal papillae
      - consists of loose connective tissue
      - supports and nourishes the epidermis
      - this contains the capillaries and nerves supplying the surface of the skin
    - - consists of of an interwoven meshwork of dense, irregular connective tissue
      - both elastic fibers and collagen fibers are present
      - elastic allows elasticity and collagen fibers limit flexability to prevent damaging the tissue