Across
- 3. The thin membrane that lines the inside of the heart.
- 4. Carry blood towards the heart.
- 5. Side of the heart that contains deoxygenated blood.
- 6. Pumps blood to the lungs.
- 10. Changes that occur in the heart during one heartbeat.
- 11. Side of the heart that contains oxygenated blood.
- 12. Pumps blood to the ventricles.
- 13. Flat discs with no nuclei and play a role in the blood clotting process.
Down
- 1. Pumps blood to the rest of the body.
- 2. Carry blood away from the heart.
- 7. The sound of one heartbeat.
- 8. The exchange of substances occurs between the blood in the ___________ and cells.
- 9. The muscular wall that divides the heart into 2.