2. Introducing… muscles

3. Muscles Made up of elastic tissue to help your body move. After my intense workout, my muscles were very sore.

4. Introducing… circulate

5. Circulate To move about or flow freely. It felt very hot and humid in the classroom because the air was not circulating correctly.

6. Introducing… Control

7. *To command, direct or rule. *To operate. The gym teacher had control of the class when she told the students to run five laps.

8. Introducing… develop

9. Develop To cause to grow or expand. In order to develop and strengthen your muscles, you need to exercise several times a week.