Across
- 4. Heart valves keep blood flowing in _____ direction.
- 5. The number one organ in keeping blood circulating.
- 9. The body system responsible for delivering nutrients and removing metabolic wastes.
- 10. The fluid portion of blood.
- 11. ______ carries blood toward the heart.
Down
- 1. Red blood cells carry ______.
- 2. Elevated heart rate.
- 3. The number of chambers in a mammals heart.
- 6. Any change in rate, rhythm, or conduction within the heart.
- 7. Formed solid element that aids in the clotting of blood.
- 8. _______ carries blood away from the heart.