1. Integumentary System “The PROTECTOR!!!”

2. Functions of the Integumentary System:  Protects internal organs/systems  Protects against infectious organisms  Prevents loss of body fluids  Regulates body temperature  Removes wastes – perspiration  Generates Vitamin D – Sunlight  Protects against sunburns  Stores fat for fuel and insulation  Sensory organ w/ receptors for touch, pressure, pain, heat, and cold

3. Parts of the Integumentary System 1.SKIN 2.HAIR 3.NAILS ***All form from dead cells which the body sheds as new cells push up from underneath.

4. skin 1. Epidermis : Outside Layer  Produces Melanin--- Gives skin its color and protects us from UV rays.  Made up of keratin (protein) 2. Dermis:  Contains nerve endings, blood vessels, hair follicles, sweat glands, oil glands. 3. Subcutaneous :  Made of fat and keeps us warm.  Holds skin to tissues  Hair starts here.

5. Nails  Protects fingers and toes  Formed from keratin(protein) and are tough and plate- like  No nerve endings  Grow 1/10 of an inch per month

6. Hair  Each hair grows out of a follicle  Hairs are large columns of dead cells which are filled with protein called keratin  Hair color is determined by amount of melanin in skin  100,000 follicles on your head