Across
- 3. the act or process of breathing
- 8. organs that are important for digesting food and liquids.
- 9. gas exchange
- 10. A tubular muscle forces food down
Down
- 1. the scientific name for a human
- 2. the function of the heart pumping blood around the body
- 4. a powerful muscular pump
- 5. takes oxygenated blood from the heart to the muscles.
- 6. a pair of organs that supply oxygen and remove carbon-dioxide.
- 7. the largest artery in the body