Across
- 3. delivers nutrients and hormones
- 8. send electrical pulses to help your heart beat at a normal rate and rhythm
- 9. pump blood out of the heart and into either systemic or pulmonary circulation
- 11. helps keep oxygen-rich blood from the lungs from mixing with oxygen-poor blood from the body
Down
- 1. feed the tissues and collect wastes to be carried back to the lungs, liver, or kidney for elimination
- 2. muscle responsible for the contractility of the heart and, therefore, the pumping action
- 4. cava carrying oxygen-poor blood to your heart's right atrium
- 5. prevent the backward flow of blood
- 6. collect oxygen-poor blood and return it to your heart
- 7. receives blood into the heart and drives it into a ventricle, or chamber, for pumping blood away from the heart
- 10. distribute oxygen-rich blood to your body