Across
- 3. to breathe air out of the body
- 5. system the body system responsible for moving the blood through the body
- 7. blood vessels that take blood to the heart
- 8. a muscle that you cannot control
- 11. are the main organs of the respiratory system, which help get oxygen into the blood
- 12. to breathe air into the body
- 14. a mineral that keeps bones healthy and strong
Down
- 1. a muscle that is attached to a bone and can be controlled
- 2. a hard, living organ that makes up the skeletal system
- 4. a group of organs that work together to perform a similar job
- 6. a special tissue that can contract
- 7. a muscle that you can control
- 9. an element found in air and used by cells to process nutrients
- 10. a group of tissues that perform a similar job
- 13. a place where bones come together and are secured by connective tissues