The Heart

2. This valve prevents deoxygenated blood from moving backward into the right ventricle.
5. The mitral/bicuspid and tricuspid valves are called the __________________ valves.
6. These are the chambers that pump blood out of the heart. They are in the lower part of the heart.
8. This is the circulation that goes throughout the body.
11. The heart has _____ chambers.
12. This is a big artery that takes oxygenated blood away from the heart and out to the body.
17. The walls of the left ventricle are the _________________ because it needs to pump blood through the entire body.
18. Another name for white blood cells.
19. This valve separates the left atrium from the left ventricle.
21. Large blood vessel with thin walls and large lumen; brings blood back to the heart.

1. Another name for platelets.
3. The membrane surrounding the heart.
4. The walls of these blood vessels are only one cell thick, which enables the exchange of materials from the blood to cells and from the cells to the blood.
7. Another name for red blood cells.
9. This valve prevents oxygenated blood from moving backward into the left ventricle.
10. Type of muscle tissue that makes up the heart.
13. This is another name for the mitral valve.
14. These are the chambers that receive blood.They are towards the top of the heart.
15. This is the circulation that goes through the lungs to pick up oxygen and release carbon dioxide.
16. Large blood vessel with thick walls, smooth muscles and small lumen; takes blood away from the heart.
20. This valve separates the right atrium from the right ventricle.
21. These blood vessels bring deoxygenated blood back to the heart.