Across
- 6. diaphragm _____ when you exhale
- 8. the vessel where oxygenated blood leaves the heart
- 10. these fight pathogens
- 13. cell fragments help blood to clot at a wound
- 14. blood pressure in arteries
- 15. water is ____ in the air you exhale
- 16. pressure ______ when you inhale
Down
- 1. where deoxygenated blood enters the heart
- 2. the vessel where oxygen blood enters the heart
- 3. these have valves to stop the backflow of blood
- 4. the tissue that the heart is mainly made up of
- 5. only one cell thick
- 7. vessel that transports oxygen to the heart
- 8. a substance found in plasma
- 9. inner lining of arteries
- 10. lumen in veins
- 11. _______ and oxygen diffuse out of capillaries
- 12. a replacement valve in the heart that lasts a lifetime