| A | B |
|---|
| blood | liquid inside the human body that delivers oxygen, nutrients and other chemicals to all parts of body; carries off waste,; fights infections; works to regulate body temperature |
| arteries | blood vessels that carry blood away from the heart to different parts of the body |
| veins | blood vessels that carry blood back from different parts of the body to the heart |
| capillaries | tiny blood vessels that deliver blood to the cells and connect arteries and veins |
| blood vessels | small tube-like structures (arteries, veins and capillaries) that allow blood to travel throughout the body |
| red blood cells | Pick up oxygen in the lungs, deliver it to other body cells and carry away waste |
| white blood cells | fight infections and carry off dead blood cells |
| plasma | the yellowish liquid river in which blood cells |
| germs | viruses and bacteria that get into the bloodstream |
| platelets | browish-yellowish bits of cells that work to form clots and reduce blood flow |
| fibrinogen | this substance forms a net at the site of a cut so the platelets stick together and stop the blood flow |
| hematology | the study of blood |
| heart | muscle that pumps the blood throughout the body |
| atrium | either of the two upper chambers of the heart |
| ventricle | either of the two lower chambers of the heart |
| pulse | the number of times that heart beats in one minute |
| circulatory system | the heart and network of blood vesssels that work together to carry blood throughout the body |
