| A | B |
|---|
| plasma | the liquid part of the blood, which is 90% water |
| red blood cells | take up oxygen in the lungs and deliver it to cells in the body |
| hemoglobin | an iron-containing protein that binds chemically to oxygen molecules |
| white blood cells | the body's disease fighters |
| platelets | cell fragments that play an important part in forming blood clots |
| lymph nodes | filters lymph, trapping bacteria and other disease-causing microorganisms in the fluid |
| atherosclerosis | a condition in which an artery wall thickens as a result of the buildup of fatty materials |
| hypertension | a disorder in which a person's blood pressure is consistently higher than normal |
