Respiratory System
Across
- 4. the flow of blood from the heart to the lungs and back.
- 6. a muscular organ that pumps blood through the body.
- 8. a part of the heart that controls the signal between atria and ventricles.
- 12. the heart’s natural pacemaker; starts each heartbeat.
- 13. the flow of blood from the heart to the rest of the body and back.
- 14. one complete heartbeat (filling and pumping of blood).
- 19. the rhythmic throbbing of arteries as blood is pumped.
- 20. the liquid part of blood that carries cells and nutrients.
- 22. blood rich in oxygen, usually found in arteries.
- 23. the wall that separates the left and right sides of the heart.
- 24. a lower chamber of the heart that pumps blood out.
- 25. pressure the force of blood pushing against artery walls.
Down
- 1. structures in the heart that keep blood flowing in one direction.
- 2. an artery that supplies blood to the heart muscle.
- 3. small blood vessels that collect blood from capillaries and carry it to the veins.
- 5. a protein in red blood cells that carries oxygen.
- 7. the main and largest artery in the human body
- 9. an upper chamber of the heart that receives blood.
- 10. blood low in oxygen, usually found in veins.
- 11. cells cells that fight infection and disease.
- 15. cells cells that carry oxygen throughout the body.
- 16. small delicate blood vessels throughout your body.
- 17. a blood vessel that takes oxygenated blood away from the heart
- 18. cell fragments that help blood to clot.
- 21. a blood vessel in the circulatory system that mostly carries deoxygenated blood towards the heart.