SKIN AND APPENDAGES
1. ANATOMY
The skin is the outer envelop of the body and has a large surface
area (1-1.8 sq. meters).
* The thickness varies, being thin on the the eyelids, glans
penis and thick on the soles of the feet, palms of the
hands and back
* There are two components of skin the outer (superficial)
epidermis with the function of producing keratin.
The cells show characteristics of differentiation
proceeding on to degeneration with the keratin placed most
superficially.
* The deeper layer,the dermis consists of collagen, elastic
fibres and fat cells(
* This deep layer supports the nerves, blood vessels and the
skin appendages (hair follicles, sweat glands).
* The skin also contains melanocytes that prduce melanin.
* This material provides colour to the skin and protects the
germinal layers and the melanocyte from the effects of
ultraviolet light.
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