Across
- 2. Largest artery in the body.
- 4. The substance to which oxygen and carbon dioxide attach .
- 6. The heart is divided into four parts called _____________.
- 10. The cell that destroys harmful organisms.
- 11. The two lower chambers of the heart that receive blood second.
- 13. A flap of tissue that prevents blood from flowing backward.
Down
- 1. (Singular) upper chambers of the heart.
- 3. Hollow, muscular organ that pumps blood throughout the body.
- 5. Red blood cells.
- 6. The smallest blood vessels connecting arteries and veins.
- 7. The movement of blood through the blood vessels.
- 8. Right side valve between Right Atrium and the Right Ventricle.
- 9. The cells that carry oxygen and carbon dioxide through the body.
- 12. A measure of your heartbeat.