Across
- 1. These carry oxygen around the body
- 3. The act of breathing in
- 4. Blood travels through this to get from the heart to the body
- 7. These fill with blood
- 10. The muscles between the ribs
- 13. The largest ventricle of the heart
- 14. Smallest branches of the lungs
- 15. This is taken out of the lungs and around the body
- 16. One of the muscles that assists breathing
- 18. The central pump of the body
- 19. Organs responsible for breathing
- 21. These prevent backflow
Down
- 1. The system responsible for respiration
- 2. These carry blood and nutrients around the body
- 4. Responsible for clotting blood
- 5. Responsible for exchanging of gases
- 6. The wind pipe
- 8. We measure this to find our heart beat per minute
- 9. These fight infection
- 11. The trachea is made of this
- 12. The large branches of the lungs
- 17. These contract to move any part of the body
- 20. Tiny hairs that filter dust and unwanted particles when breathing in