Across
- 4. the first chamber that deoxygenated blood enters in the heart
- 7. the valve that connects the left atrium and ventricle
- 8. the protein in red blood cells that binds to oxygen
- 9. the muscle layer in the heart that contracts causing the heart to beat
- 10. the blood vessel that carries deoxygenated blood back towards the heart
- 11. keeps oxygenated blood from flowing from the aorta to the right ventricle
- 13. the two tubes that connect trachea to lungs
- 14. the component of blood that cntains dissolved gases and minerals
- 15. the largest artery in the body
- 16. the voicebox
- 18. the component of blood responsible for clotting and healing broken blood vessels
- 23. the tube that moves air from the mouth and nose to the lungs
- 27. the large vein through which oxygen-poor blood from the top half of the body enters the heart
- 28. smaller braches of the bronchi
- 29. supply the heart muscle cells with oxygen-rich blood
Down
- 1. this is the largest type of blood vessel in the body
- 2. the large vein through which oxygen-poor blood from the top half of the body enters the heart
- 3. the vessel that returns oxygenated blood to the heart
- 5. microscopic air sacs where gas exchange takes place
- 6. the only artery in the body that contains deoxygenated blood
- 12. the valve that connects the two right chambers of the heart
- 17. the chamber that deoxygenated blood leaves when it enters the pulmonary arteries
- 19. the last chamber that oxygenated blood enters in the heart
- 20. the first chamber that oxygenated blood enters in the heart
- 21. the component of blood that fights infection
- 22. the tiniest blood vessels in the body
- 24. the component of blood that contains hemoglobin and carries oxygen
- 25. the large dome shape muscle that contracts when we inhale
- 26. the area in the back of the throat