Across
- 1. means relating to the lungs
- 2. main organ of the circulatory system
- 6. small group of sells that send an electric current to the heart to control the hearts beat
- 9. largest artery in the body
- 11. means relating to the heart
Down
- 1. the push of blood through the arteries
- 3. carries blood from the heart to all parts of the body
- 4. small blood vessels that connect the arteries and veins
- 5. lower chamber on each side of the heart
- 7. flap of tissue found in the heart that opens and closes to allow blood flow
- 8. carries blood back to the heart
- 10. upper chamber on each side of the heart