Across
- 2. similar cells together to make a ______
- 5. An organ where gas exchange occurs between air and blood
- 7. this is produced by the mouth to digest with aid
- 8. The fluid pumped by the heart around the circulatory system
- 9. this system protects the body from infection
- 10. this tube carries blood back to the heart
Down
- 1. this has a layer of muscle of the over the bones to produce movement
- 3. is a strong yet flexible framework of the body and also protects some inner parts of the body
- 4. process when animals take in oxygen and take out carbon dioxide
- 6. the movement of blood around the body