Please enable JavaScript.

Coggle requires JavaScript to display documents.

integumentary system - Coggle Diagram

- - - - melanocytes --> 8%
        
        produce pigment melanin
      - intraepidermal macrophage cells
        
        participate in immune response
      - tactile epithelial cells (Merkel cells)
        
        detect touch sensations
      - keratinocytes --> 90%
        
        produce leratin
    - - stratum granulosum
        
        3-5 layers
        
        flatten and undergoing apoptosis
        
        has dark staining granule and lipid-rich secretion to be water-repellent
      - stratum lucidum
        
        be seen in thick skin
        
        clear/flat/dead cells
        
        4-6 layers
      - stratum spinosum
        
        8-10 layers
        
        superficial-flattened and thorn-like spine
      - stratum corneum
        
        25-30 layers
        
        dead keratinocytes
      - stratum basale
        
        cuboidal or columnar keratinocytes and some stem cells
  - - - papillary region
        
        dermal papilla(真皮乳突) / taller and numerous in sensitive region
        
        increase contact with epidermis
        
        capillary loops / touch receptor : Meissner corpuscles (觸覺小體)
        
        free nerve endings (神經末梢直接傳訊 :
        warmth/coolness/pain/tickling/itching
      - reticular region
        
        bundles of thick collagen fibers / elastic fiber / fibroblast / wandering cells / adipose cells
        
        tension lines : 紋理有一定方向,手術順著紋理切會減少傷害