Trace, the relationship between biological and cultural evolution of thatmankind.

C. Answer the questions. 1. Describe the air sacs of the lungs. 2. How does oxygen get to every cell in the body? 3. How does carbon dioxide leave the blood? 4. What would happen if your body cells could not get rid of carbon dioxide?

Write the answer on the lines. 10. How are fats broken down?

4. Carbohydrates are found in (a) breads and pasta. (b) water. (c) vitamins. 5. Urine moves from the kidneys to (a) the rectum. (b) the large intestine. (c) the bladder. in 6. Keep your lungs healthy by (a) smoking. (b) exercising. (c) dieting.

Name the body systems helped by each of the following. 1. Not smoking 2. Caring for teeth 3. Drinking liquids

2. Energy from food can be measured in (a) calories. (b) vitamins. (c) nutrients. 3. The unused part of food in the excretory system (a) stays in the body. (b) is called waste. (c) goes into the lungs.