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What are the functions of the skin?
Thermoregulation
Blood Reservoir
Protection
Cutaneous Sensations
Excretion and Absorption
Synthesis of Vitamin D
The skin contributes to thermoregulation in which two ways?
1. By liberating sweat at its surface
2. By adjusting the flow of blood in the dermis
The skin acts as a blood reservoir. What is this?
Systemic veins and venules that contain large amounts of blood that can be moved quickly to parts of the body requiring the blood.
How does the skin provide protection?
Keratin protects underlying tissues
Lipids released by lamellar granules inhibit evaporation of water
The oily sebum contains substances that kill bacteria
Melanin protects against UV
What two cell types carry out protective immunological functions?
Intraepidermal macrophages
Macropages in the dermis
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