Across
- 5. tiny blood cell fragments that help stop bleeding by forming clots
- 6. carries oxygenated blood from the lungs to the heart
- 7. smaller branches of the bronchi
- 8. tiny air sacs in the lungs where oxygen enters the blood
- 12. to prevent backflow of blood
- 13. oxygen and ... are needed for aerobic respiration
- 16. smoking increases the risk of .... eye problem
- 17. the part of the circulatory system made up of heart, blood, and blood vessels
- 20. the upper passageway where air is warmed and filtered
- 21. the tiny hair-like structures in the nose that help trap dust and particles
- 22. blood cells that fight infections and protect the body from germs
- 23. tube that carries air from the throat to the lungs
- 24. bronchi transport air from … to lungs
- 26. layered membrane that surrounds the lungs and provides lubrication
Down
- 1. the process by which the body releases energy from food
- 2. the red pigment in blood that carries oxygen
- 3. The harmful addictive substance found in cigarettes
- 4. muscle below the lungs that helps you breathe in and out
- 5. Blood vessel that leaves the right ventricle to travel to the lung
- 9. the voice box located above the trachea
- 10. the process oxygen is inhaled and carbon dioxide is exhaled is called
- 11. chamber of the heart that pump blood to the entire body
- 14. type of blood vessel for gas exchange and extremely thin
- 15. bronchi to become restricted (get smaller) so air can't get to the lungs.
- 18. largest artery in the human body
- 19. anaerobic respiration need the substance
- 25. exercise that strengthens the heart and improves blood circulation