Match these items.

1. the fluid that runs through the circulatory system
2. 95 percent water
3. the lower part of the heart
4. a gas expelled by the body through the lungs
5. the upper part of the heart
6. help to stop bleeding
7. carry oxygen to the cells and take carbon dioxide away
8. help the body fight infection

platelets
blood
red blood cells
carbon dioxide
atria
white blood cells
ventricles
plasma