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Integumentary System (2.A General functions of integumentary and…

- - - - Epidermis: composed of stratified squamous epithelial tissue.
      - Dermis: composed of connective tissue.
        
        Papillary dermis: composed of areolar connective tissue
        
        Reticular dermis: composed of dense irregular connective tissue
      - Hypodermis: composed of adipose tissue.
    - - Stratum corneum: apical layer composed of dead keratin cells.
      - Stratum lucidum: layer inferior to the stratum corneum in thick skin ONLY.
      - Stratum granulosum: composed of granules that produce a waterproof glycolipid.
      - Stratum spinosum: 5-20 layers thick, contain dendritic cells
      - Stratum basale: The deepest level of the epidermis. One layer, with stem cells, melanocytes, tactile cells all belong here.
- - - - Ex: radiation.
  - - - Constriction and relaxation of the blood vessels allowing less or more blood to the help vital organs.
- - - - Produce keratinocytes and stem cells that constantly regenerate.
    - - More production=darker skin
    - - Sensory receptor that is sensitive to enough of a touch that will send a message to the process.
    - - Mobile in the stratum spinosum looking for invaders.
- - - - Function: cooling
      - Secretion type: Merocrine
    - - Function: Evaporative cooling, odor producing
  - - - Keeps our skin moisturized while trapping dirt.