Across
- 4. carry nutrients and blood away from the heart
- 5. pumps blood through veins, arteries, and capillaries
- 9. connect veins and arteries
- 10. around how many liters are there of blood in the human body
Down
- 1. _______ vena cava, where veins connect from the top of the heart
- 2. _______ vena cava, where veins connect from the bottom of the heart
- 3. carry nutrients and blood to the heart
- 6. where oxygen-rich blood comes out of the heart
- 7. where gas exchange happens
- 8. go in one direction & let blood flow through heart