Answer the questions. 1. Are all blood vessels the same size? 2. Which type of blood vessel carries blood away from the heart? 3. Which blood vessels do body cells get food and oxygen from? 4. What happens to blood pressure when arteries are blocked with fat?

6. Cells produce energy from (a) muscles. (b) oxygen and food. (c) carbon dioxide.

3. Draw a relaxed and contracted sarcomere (see Textbook, p. 286, Fig, 11,6):

Draw a relaxed and contracted sarcomere (see Textbook, p. 286, Fig. 11.6)

A. Fill in the missing word. 1. The raw materials your body needs are called (cells, nutrients) 2. Both cheeses and meats contain . (carbohydrate, protein) 3. Sugar is a kind of 4. For energy, your body uses (bones, carbohydrates) 5. Proteins are found in milk and

6. Carbohydrates are either starches or \( \begin{array}{lll}\text { (a) salts } & \text { (b) sugars } & \text { (c) fats }\end{array} \)