ANATOMY OF SKIN - PowerPoint PPT Presentation

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ANATOMY OF SKIN

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ANATOMY OF SKIN [2] Thermoregulation [5] Vitamin D Synthesis ANATOMY OF SKIN [2] Thermoregulation [5] Vitamin D Synthesis Functions Of The Skin Non-specific immunity ... – PowerPoint PPT presentation

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Title: ANATOMY OF SKIN


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ANATOMY OF SKIN
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Functions Of The Skin
1 Protection
Non-specific immunity (details to follow in later
lectures)
Anatomical barrier against infection
Melanin screen out excess UV rays
When melanin is darkened by the tan ? transferred
to outer skin layers (suntan) ? skin less
sensitive to sunrays
Dark skin due to wider distribution of melanin
beyond stratum basale into higher levels of
epidermis
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2 Thermoregulation
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3 Sensory Perception
Millions of nerve endings
Receptor for pain, heat and pressure
Therefore, maintain homeostasis
4 Excretion
Excretion of lactic acid and sodium chloride
Urea (1 g nitrogenous waste eliminated through
skin per hour)
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5 Vitamin D Synthesis
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