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Kamila Hermosillo, P1 Integumentary - Coggle Diagram

- - - - 1: Keratinocytes
        
        produce keratin(protein that gives skin protective properties
        
        Major cells, millions shed off
      - 2: Melanocytes
        
        spider-shaped, produce pigment(melanin) protect from UV damage
      - 3: Dendritic(Langerhans)
        
        star-shaped, deep epidermis, activators in immune system
      - 4: Tactile(Merkel)
        
        sensory receptors
    - - 1: Stratum Basale
        
        deepest layer, attached to dermis, single row of cells that divide, composed of melanocytes(produce melanin)
      - 2: Stratum Spinosum
        
        spiky Keratinocytes
      - 3: Stratum Granulosum
        
        Keratinization begins, slows water loss, cells above die
      - 4: Stratum Lucidum(only in thick skin)
        
        thin rows of dead keratinocytes
      - 5: Stratum Corneum
        
        rows of Kerantinized dead cells, function to protect deeper cells, prevent water loss and go through apoptosis for cell change(produce carotene from diet, also in hypodermis)
  - - - blood vessels,
      - Dermal papillae: top region of dermis that shoot projections up into the epidermis
        
        Projections: capillary loops, free nerve endings, touch receptors
        
        lie on top of dermal ridges(friction ridges) contribute to touch
    - - 80% of dermal thickness, keep skin hydrated
- - - - Shafts: Medulla (central core), Cortex (surrounds Medulla), Cuticle (outer layer that overlaps)
- - - - A: asymmetry, B: border irregularity, C: color, D: diameter (larger than 6mm)