Across
- 5. The flow of blood through the body
- 6. Essential gas for cellular respiration
- 7. The largest artery in the body
- 9. Wind pipe
- 12. Carry oxegenated blood away from the heart
- 13. Lower chambers of the heart
- 15. Musle aiding in breathing
Down
- 1. Process of breathing
- 2. Carry deoxygenated blood to the heart
- 3. Vein Carries oxegenated blood from lungs to the heart
- 4. Airwyaas branching in the trachea
- 8. Central organ of circulation
- 10. Tiny air sacks in the lungs
- 11. Upper chambers of the heart
- 14. Organs where gas exchange takes place