Across
- 2. lower chamber of the heart that pumps blood out
- 4. hollow muscle that pumps blood throughout the body
- 7. flap of tissue in the heart that prevents blood from flowing backward
- 8. blood vessel that carries blood to the heart
- 10. largest artery in the body
Down
- 1. blood vessel that carries blood away from the heart
- 3. system that consists of the heart and blood vessels; another name for the circulatory system
- 5. the alternating expansion and relaxation of the artery wall as blood travels through it
- 6. tiny blood vessel where substances are exchanged
- 9. upper chamber of the heart that receives blood