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Largest organ of body Part of Integumentary system |
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Skin provides protection from: |
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Ultraviolet Light Physical trauma Chemicals Infectious organisms water loss |
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Layer of dead cell in epidermis. Constantly shedding and replaced from less mature underlyng cells. |
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- Produce Melaninn
- SPF modified amino acid
- fewer in epidermis
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Guard against foreign substances few in epidermis |
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Produce structural proteins called Keratin Many of them in epidermis |
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deep depressions of epidermis producing filamentous keratin bundles (hair) hair provides shade, insulation, and sensation |
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| filamentous cross-linked keratin bundles |
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the inner layer of skin not replaced easily contains alot of Fibroblasts |
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produce proteins that crosslink collagen, elastin and others Found predominatly in dermis |
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| Help reduce internal heat by excreting salty water (sweat) that cools the skin as it evaporates |
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produce oils that protect and lubricate the skin wash off with soap also produce Pheromones that are involved in subconscious communication |
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| distributed over all the body but is more prevalent in certain areas |
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