Across
- 1. Blood vessels that carry deoxygenated blood from the tissues back to the heart.
- 5. The middle layer of the heart wall that contains the heart muscle cells.
- 6. The sac-like membrane that surrounds and protects the heart.
- 7. output The amount of blood pumped by the heart per minute.
- 11. The largest artery in the body that carries oxygenated blood from the heart to the rest of the body.
- 13. Beat of the heart.
- 14. valve Located between the right atrium and the right ventricle; it has three (tri-) leaflets, or cusps.
- 15. Small blood vessels that connect arteries to capillaries.
Down
- 2. The innermost layer of the heart wall that lines the chambers and valves.
- 3. The phase of the cardiac cycle when the heart muscle contracts and pumps blood out of the chambers.
- 4. Tiny blood vessels that connect arterioles to venules and allow for the exchange of nutrients, gases, and waste products between the blood and tissues.
- 8. Blood vessels that carry oxygenated blood away from the heart to the rest of the body.
- 9. The phase of the cardiac cycle when the heart muscle relaxes and fills with blood.
- 10. small vein
- 12. The two upper chambers of the heart that receive blood from the veins and pump it into the ventricles.