Across
- 2. the tough, slippery that encloses the heart
- 3. capillaries merge into these
- 9. the organ that pumps blood to the rest of the body
- 11. arteries branch out into these
- 12. venules carry blood into these
- 13. arterioles branch out into these
- 14. ______ circulation is the flow back to the heart
Down
- 1. the system that includes the heart, veins, and arteries
- 3. the heart's lower chamber
- 4. the heart's upper chamber
- 5. a straw colored liquid in the blood
- 6. large blood vessels that carry blood away from the heart
- 7. _____ circulation is transports blood between the heart and the lungs
- 8. ______ circulation is the flow of blood to the body except the lungs
- 10. ________ cells the blood that transports oxygen