Ch. 21.2 Systems in the body function to maintain health.

Vocabulary: nutrition, addiction
Review:
1. Nutrients keep the body functioning properly.
2. Exercise causes deeper inhales and exhales that make the heart and muscles of the respiratory system stronger.
3. tobacco- damages respiratory and circulatory systems, high risk of cancer and heart disease; alcohol- damages liver, heart, nervous, and digestive systems; drugs- damage the nervous system and can cause heart and lungs to stop
4. Answers should include a relaxing lifestyle, good nutrition, exercise, and avoiding harmful drugs.
5. Nutrients are sources of energy for the body. A person needs enough water each day to keep body systems functioning.
6. This diet would cause poor health. A diet should contain about 10 to 15 percent fats.