Across
- 4. a one-way opening
- 6. blood vessel that carries blood away from the heart
- 8. an organ that contains oxygen
- 9. a sequence of events in which the heart contracts and relaxes
Down
- 1. main artery, carries oxygenated blood from heart to body
- 2. pumps blood to lungs and body
- 3. the organ that pumps blood through the body
- 4. blood vessel that carries blood towards the heart
- 5. receives blood from lungs and body
- 7. liquid that flows through the body, carrying oxygen, waste and nutrients