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Skin

Skin. Appendages. Skin Appendages. Hair Nails Glands. 1. Hair. Complete body EXCEPT Lips Nipples Palms Soles of feet. Hair. Shaft = seen above skin Follicle = surrounds hair below surface in epidermis. Hair. Mitosis for hair formation (cells mostly keratin )

isaac-robinson
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Skin

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  1. Skin Appendages

  2. Skin Appendages • Hair • Nails • Glands

  3. 1. Hair • Complete body EXCEPT • Lips • Nipples • Palms • Soles of feet

  4. Hair • Shaft = seen above skin • Follicle = surrounds hair below surface in epidermis

  5. Hair • Mitosis for hair formation (cells mostly keratin) • Overlap like shingles • Unravel layers = split ends

  6. Hair

  7. Split Ends

  8. Hair • Melanocytes - hair color • Melanin with iron = Red hair • Lack of melanin = gray or white hair

  9. Shape of Shaft • Round = Straight hair • Oval = Wavy hair • Flat = Curly hair

  10. Hair • Papilla – supplies blood supply • Alopecia = loss of hair • Genetics

  11. 2. Finger Nails • Keratinized cells • Densely-packed • Lunule = Crescent-shaped area of nail • cell growth below lunula

  12. Finger Nails

  13. Sweat Glands • Sudoriferous glands • Dermal layer • Salts and wastes • Regulate body temp

  14. Sebaceous Glands • Oil glands • Dermal layer • FX • Keeps hair and skin soft • Prevents water loss

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