covers and protects underlying tissue
joins, supports, protects, insulates, and nourishes organs
cells contract and relax for movement
sends electrical signals through the body
enables bones to move; triceps
moves food through digestive system; stomach
pumps blog around body; heart
tiny sac where the hair forms in the dermis
release oil that keeps hair flexible and waterproofs epidermis
What is unique about your hair and nails?
They are both made out of the same stuff and are nonliving.
How do muscles work?
In pairs. Extensor and Flexor.
How does Aerobic Exercise help?
Strengthens heart and increases endurance.
How does Resistance Exercise help?
Strengthen skeletal muscles.
Major functions of skin?
-Keeps water in your body and foreign particles out
-Lets you feel the outside world
-Helps regulate your body temperature
-Gets rid of wastes
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