Across
- 5. They help ensure that blood moves at the right time and in the correct direction
- 8. responsible for the contractility of the heart and the pumping action
- 10. exchange what arteries and veins carry
Down
- 1. very large veins that bring deoxygenated blood to your heart to get oxygen
- 2. carries blood that has oxygen and nutrients in it
- 3. one of the two upper chambers in the heart that receives blood from the circulatory system
- 4. It acts as the hearts pacemaker
- 6. main blood vessel through which oxygen and nutrients travel from the heart to organs throughout your body
- 7. blood vessels located throughout your body that collect oxygen-poor blood and return it to your heart
- 9. wall of tissue that separates the left and right sides of the heart and enables blood to flow as it should