1. STARTER #3 1.Label the cavities to the right a. b. c. d. 2.What type of tissue lines organs and cavities? 3. What type of tissue is this?

2. INTEGUMENTARY SYSTEM PP 924-926

3. PARTS OF INTEGUMENTARY Skin Nails Hair

4. SKIN FUNCTION Barrier against mechanical and chemical injury Protection of microbial invasion Prevention of dehydration Regulation of body temperature Sensory Vitamin (D) synthesis

6. SKIN LAYERS Epidermis- outermost layer of skin Contain melanocytes make melanin (gives pigment and protection from UV light)

7. SKIN LAYERS Dermis-inner layer of skin composed of blood vessels, nerves, hair follicles, glands

8. SKIN LAYERS Glands Oil glands attached to hair follicles Secrete sebum (oils) Sweat glands regulate body temperature Subcutaneous: fat cells (insulation)

9. SKIN CANCER Most common in the U.S. Can affect skin cells or melanocytes (worst type) People of light skin tone, blue eyes, and red hair are most at risk

10. NAILS Protect ends of toes and fingers Made of keratin

11. HAIR Protect and insulates the body Produced by hair follicles Made of keratin