The$Integumentary$System
Of all the body’s organs, none is more easily inspected or more exposed to infection,
disease, and injury than the skin. Because of its visibility, skin reflects our emotions and some
aspects of normal physiology, as evidenced by frowning, blushing, or sweating.
Functions:
1. Regulation of body temperature through sweating
2. Protection from dehydration, abrasion and UV light
3. Sensory input (pain, temperature, touch, pressure)
4. Excretion of small amounts of urea
5. Immunity – prevents microorganisms from entering body
6. Blood reservoir (8-10% of blood volume is in the skin)
7. Vitamin D production.
1. Skin
- Largest organ of the human body
- Weighs about 7% total body weight and covers about 2 square meters
- Dermatology= the medical specialty that diagnoses and treats disorders of the skin
- Consists of three layers of tissue:
1. Hypodermis (deepest layer)
2. Dermis
3. Epidermis (superficial layer)
Laura Eberhardt Monday, October 6, 2014 at 2:58:09 PM Eastern Daylight Time 34:15:9e:2f:3a:92
