Skin Appendages. Skin Appendages Hair Nails Glands.

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Presentation transcript:

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) – Overlap like shingles – Unravel layers = split ends

Hair

Split Ends

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

Shape of Shaft Round = Straight hair Oval = Wavy hair Flat = Curly hair

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

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

Finger Nails

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

Sebaceous Glands Oil glands Dermal layer FX – Keeps hair and skin soft – Prevents water loss

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