Across
- 5. The four sections of the heart that receive and pump blood.
- 6. The wall that divides the left and right sides of the heart.
- 7. A blood vessel that carries blood away from the heart.
- 14. The largest vein that returns blood to the heart.
- 16. The force exerted by blood against vessel walls.
- 19. Tissue death due to lack of blood supply.
- 20. A heart chamber that pumps blood out of the heart.
- 21. A small artery that leads to capillaries.
- 22. A small vein that connects capillaries to larger veins.
- 23. The thick muscular layer of the heart.
Down
- 1. An instrument used to listen to heart and lung sounds.
- 2. A device used to measure blood pressure.
- 3. The membrane that surrounds and protects the heart.
- 4. The heart's natural rhythm regulator.
- 8. The largest artery in the body.
- 9. The phase of the heartbeat when the heart muscle relaxes.
- 10. The smallest blood vessel where gas and nutrient exchange occurs.
- 11. Structures that prevent backflow of blood in the heart.
- 12. The phase of the heartbeat when the heart muscle contracts.
- 13. A blood vessel that carries blood back to the heart.
- 15. A test that records the electrical activity of the heart.
- 17. Related to the lungs, such as the artery that carries blood to them.
- 18. A heart chamber that receives blood from veins.