Across
- 4. This valve is located between the left atrium and left ventricle.
- 5. What is the upper chamber of the heart called?
- 8. A muscular wall that separates the heart into the left and right side.
- 9. A body system that consists of the heart, blood vessels and blood; also called circulatory system.
- 11. When blood is separated,the liquid layer is called _____.
- 13. Oxygen lacking blood enters the heart through the vena cava and moves into the _____.
- 14. The _____ powers the entire circulatory system.
- 15. The walls of the heart are composed of _____ layers.
Down
- 1. _____ keep blood from flowing backwards in the heart.
- 2. ______ carry blood to the heart.
- 3. The smallest of vessels; where the exchange of gas, nutrients and waste occurs.
- 6. The ______ artery carries blood from the right ventricle to the lungs.
- 7. _____ carry blood away from the heart.
- 10. What is the lower chamber of the heart called ?
- 12. Blood leaves the left ventricle through the _____.