Across
- 2. Lower chamber of the heart that pumps blood out
- 3. microscopic blood vessel where oxygen and nutrients are exchanged with tissues
- 6. the rhythmic throbbing of arteries produced by the beating heart
- 8. Upper chamber of the heart that receives blood
- 11. medical term for an abnormally fast heart rate
- 12. the thick, muscular middle layer of the heart wall
- 13. the protective, fluid-filled sac surrounding the heart
- 14. the network of blood vessels that supply the heart muscle itself
Down
- 1. medical instrument used to listen to heart sounds
- 2. a flap of tissue that prevents the backward flow of blood
- 4. relating to the lungs, as in the arteries and veins connecting them to the heart
- 5. the largest artery in the body, carrying oxygen-rich blood away from the heart
- 7. the muscular wall dividing the left and right sides of the heart
- 9. medical term for an abnormally slow heart rate
- 10. the heart's natural electrical node that regulates rhythm