1. The Body • The body is a system of levers, pumps, electrical charges and chemical reactions • The body is a living, growing and changing organism

2. Integumentary System • Skin, hair, nails and sweat glands • The skin is the main barrier or protective covering • From injury,invasion of pathogens, waterproof, UV rays, and holds water in

3. Integumentary system • Regulates body temperature • Blood vessels dilate to release heat (radiant) • Perspiration from sweat glands evaporate • The oder is due to the chemicals contained in the sweat • Provides a sense of touch for the surrounding world • Replaces itself about once a month

4. Epidermis • Dead cells tough protective layer • Outer skin replaced once a month • Lipids contains fatty substance for waterproofing • Melanin: Pigment gives skin, hair and eyes their color

5. Dermis • Conective tissue • Spongy • Elastic • Flexible • Contains nerve endings, fair folllicles, and sweat glands

6. Hypodermis • Attaches skin to bones and muscles

7. Warts are caused by a virus • Ring worm is caused by fungus • Abdominal hernia • A weakness in the abdominal wall resulting in a protrusion from lifting heavy weights • Osteoarthritis abnormal wear of a joint • Pimple is an infected hair follicle