| A | B |
|---|
| blood | The way needed substances are carried to the body cells. |
| valves | Structure that prevents blood from flowing backward. |
| capillaries | Vessels where materials are exchanged between the blood and the body cells. |
| ventricle | Pumps blood out of the heart |
| hypertension | A condiiton where blood pressure is high |
| ventricles | When they contract blood is forced out of the heart |
| atria | Upper chambers that receive blood that comes into the heart |
| atherosclerosis | Condition in which artery walls thicken as the result of a buildup of fatty materials. |
| red blood cells | A component of blood that carries oxygen to the body cells. |
| arteries | Blood vessels that carry blood AWAY from the heart |
| veins | Blood vessels that flow to the heart. |
| plasma | A component of blood that is 90% water |
| white blood cells | Blood cells whose function is to fight disease |
| blood pressure | Caused by the force with which the ventricles contract |
| clotting of blood | This process could not take place if a person's blood lacked platelets |
| platelets | Needed for the clotting of blood |
| exercise | Important for cardiovascular health because it strengthens the heart muscle |
