Across
- 2. - filters blood in the kidney
- 4. - muscle that contracts and relaxes to cause lung inflation/deflation
- 6. - main artery leaving the heart
- 8. - tiny sacs of air in the lungs
- 9. - tube connecting mouth to stomach
Down
- 1. - Largest organ in the body
- 3. - pumps blood through the body
- 5. - bone in upper arm
- 7. - bone connecting forearm on thumb side