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The integumentary system includes:
Skin
Appendages`of the skin
Appendages of the skin:
Oil glands
Hair
Sweat glands
Nails
Layers of the skin
Epidermis
Dermis
Hypodermis (Subcutaneous tissue)
Epidermis
Superficial layer
Made of 50 layers of epithelial cells
Protective layer of the body
Avascular
Dermis
Deeper layer of the skin
Makes up most (90%) of skin
Made of connective tissue
Vascular
Hypodermis (Subcutaneous tissue)
Not a part of the skin
Deep to the skin
Made of adipose tissue
Cells of Epidermis
Kertinocytes
Langerhans Cells
Melanocytes
Keratinocytes
90% of epidermal cells
Produces keratin, helps protect skin from abrasion
Produced in Stratum Basale, pushed upward by new cells
Friction stimulates keratinocyte production