Across
- 2. takes in CO2 and expels Co2
- 5. tiny sacs that exchange of oxygen and carbon dioxide occurs in your blood system
- 7. pipe that connects the mouth and lungs
- 9. allows air to enter and exit the body
- 10. takes oxygen rich blood from the heart to the body
Down
- 1. Muscles that move up and down to control the movement of the lungs
- 3. attached to bones
- 4. found in all organs
- 6. found in the heart
- 8. pumps blood throughout the body