| Term | Definition |
|---|
| heart | hollow, muscular organ in the center of the chest that pumps blood throughout the body |
| septum | a wall of tissue that separates the left and right sides of the heart |
| blood vessels | hollow tubes that transport blood through the body |
| arteries | take blood away from the heart |
| capillaries | smallest blood vessels; materials are exchanged between the blood and the body's cells |
| veins | carry blood back to the heart |
| blood | connective tissue that includes plasma, red and white blood cells and platelets |
| atria | upper chambers of the heart that receive blood that comes into the heart |
| ventricles | lower chambers of the heart that pump blood out of the heart |
| valve | a flap of tissue that prevents blood from flowing backwards |
| pacemaker | a group of cells that adjusts the rate of the heart beat |
| aorta | the largest artery of the body |
| plasma | made mostly of water and carries nutrients, chemical messengers and wastes in it |
| red blood cells | pick up oxygen in the lungs and carry it to the cells in the body |
| hemoglobin | iron-containing protein found in red blood cells that binds chemically to oxygen molecules |
| white blood cells | disease fighting cells |
| platelets | pieces of cells |
| Rh factor | a marker on Red blood cells that determine whether a person is Rh positive or Rh negative |
Combine with other sets
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