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Why do we have skin?

Skin is a dynamic, protective organ that grows, stretches, shrinks, creases, and wrinkles in response to a person's age, habits, weight fluctuations, and the environment. Skin serves many important functions including:
  • protecting the body from environmental factors such as bacteria, fungus, viruses, allergens, water, and chemicals
  • regulating body temperature by sweating and adjusting blood flow to the skin
  • synthesizing vitamin D
  • helping the body sense touch, pain, temperature, pressure, and position
  • providing some protection against the sun's harmful ultraviolet rays via the skin protein melanin

Continue Learning about Functions of Skin

Could I have very salty sweat?
National Academy of Sports MedicineNational Academy of Sports Medicine
Yes. Equipment in physiology labs can assess the mineral content of an athlete’s sweat, but ther...
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What's the largest human organ?
Dr. Mehmet Oz, MDDr. Mehmet Oz, MD
The skin is the largest human organ.
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How does skin control body temperature?
Dr. Doris Day, MDDr. Doris Day, MD
Your skin regulates your body temperature through blood vessels and through the process of sweating....
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What are the essential components of stratum corneum?
Dr. Mehmet Oz, MDDr. Mehmet Oz, MD
The stratum corneum, also known as the skin barrier, is the outermost layer of skin which protects u...
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.