Circulatory System

4. These are used in blood clotting when there's a cut.
5. This type of blood vessel carries blood BACK to the heart under low pressure.
7. This cells engulf bacteria and protect the body.
9. This vein carries oxygenated blood from the lungs to the heart.
11. This type of blood vessel carries blood AWAY from heart under high pressure.
12. This artery carries deoxygenated blood from the heart to the lungs.
13. This component of blood is light yellow liquid containing mostly water with dissolved nutrients.
17. The heart has lower chambers called _____________
19. tubes that carry blood within the body
21. This artery carries oxygenated blood to all parts of the body.
22. This side of the heart contains blood with more carbon dioxide (deoxygenated).

1. In general, the size of your heart is like your clenched ______.
2. This side of the heart contains blood rich in oxygen (oxygenated).
3. This cells have biconcave shape and no nucleus.
5. This part of the heart ensure blood flows in one direction. It prevent bloods from going backwards.
6. it is an organ that pumps blood throughout the body
8. This type of blood vessels is only one cell thick and used for exchange of substances between blood and the tissues.
10. The left ventricle has thicker and muscular __________ to withstand pressure as blood are pumped blood to all parts of the body.
14. The blood circulates around the body and passes through the heart twice hence why it's called __________ circulation.
15. This blood vessel leads to right atrium and contain blood rich in carbon dioxide.
16. The heart has upper chambers called ___________
18. A fluid that transport substances throughout the body
20. The right ventricle pump blood to this organ.