Circulatory System

1. The number of chambers in the heart.
3. The liquid part of the blood that contains, nutrients, water, minerals, proteins, and sugar.
6. Blood with oxygen.
9. The part of the blood that fights off bacteria and viruses.
10. The Circulatory System ___ nutrients, water, oxygen, and waste products around the body.
13. Valves in this heart allow blood to flow in ___ direction.
14. The heart is made of this type of muscle.
15. A small blood vessel that connects veins and arteries.
16. The number of liters of blood in the body.
17. The place where nutrients enter the bloodstream.
18. The place where oxygen enters the blood and carbon dioxide leaves the blood.
19. Carry blood AWAY from the heart.

1. The heart is about the size of your ___.
2. The part of the blood that is responsible for carrying oxygen.
4. The largest artery in the body.
5. The protein that allows oxygen to stick to a red blood cell.
7. Blood without oxygen.
8. Brings blood back to the heart.
11. The part of the blood that is responsible for clotting and forming a scab.
12. The heart, blood vessels, and blood are all part of the ____ system.