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Published byVirgil Clark Modified over 9 years ago
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What are the functions of the skin?
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Derivatives of the Skin
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Sweat Glands ~3 million of them throughout the body! Per person!
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Eccrine Sweat Glands Releases into skin surface Most abundant sweat glands Also on soles, palms, and forehead Secretory part in dermis
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What makes you sweat
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Apocrine Sweat Glands Empty into hair follicles Larger then eccrine Axillary and anogenital areas Fatty and protein substances Milky and Yellowish color… oooo! Released during pain, stress, and sex?
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Ceruminous Glands Release earwax!
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Mammary Glands Secrete milk! We’ll talk about them a little bit later
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Sebaceous Glands Oil glands – all over body Produce sebum Release into hair follicle – Maybe a pore Hormones stimulate
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Hair and Hair Follicles What is the point? Some people get a lot… lucky!
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Some people don’t get any
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Hair Growths of the epidermis variously distributed over the body. Dead keratinized cells DIVIDED INTO TWO MAJOR DIVISIONS: 1. THE ROOT 2. THE SHAFT
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THE ROOT Portion just below the surface that penetrates into the dermis. Surrounding the root is a hair follicle At the base of each follicle is an enlarged structure called a bulb.
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Hair Follicle Each follicle gets – Arrector pilli – smooth muscle – Nerves! – root hair plexus – Hair papilla – capillaries!
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NAILS Hard keratinized cells of the epidermis 3 parts: 1. Nail body- portion that is visible 2. Free edge-Any part that may project beyond the distal end of the digit. 3. Nail root-Hidden in proximal nail groove
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Structure of a hair follice
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Hair Growth
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