Across
- 3. What stops you from eating and breathing at the same time
- 8. what are the branches that end up on tiny air sacs
- 9. _______ carry away blood from the heart
- 10. The upper chambers in the heart are called
- 13. The main artery in the left atrium is?
- 14. where are the lungs
- 16. what is used to measure the O and CO2
- 18. Voice box in another name
- 19. When energy is released it is called
Down
- 1. the trachea splits into two the small branches the short on is called _________
- 2. What helps in the flow of blood in the veins
- 4. Oxygenated blood returns to the left atrium in the ______ vein
- 5. _________ carry blood to the heart
- 6. William _____ made the discovery of the blood circulation
- 7. The smallest branches in arteries are called
- 11. what is the blockage from blood going back
- 12. Another name for windpipe is?
- 15. _____ arteries carry oxygenated blood to the heart muscle
- 17. What controls the beating of the heart