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the heart and blood
| Term | Definition |
|---|---|
| heart | a muscular organ that pumps blood throughout the body |
| artery | a blood vessel that carries oxygen-rich blood away from the heart to the tissues |
| vein | a blood vessel that carries the oxygen-poor blood back to the heart |
| capillary | tiny blood vessels where the exchange of oxygen, nutrients, and waste occurs between blood and tissues |
| aorta | the largest artery in the body, carries oxygenerated blood from the heart to the rest of the body |
| pulmonary artery | the artery that carries oxygen-poor blood from the heart to the lungs for oxygenation |
| red blood cells | cells in the blood that carry oxygen from the lungs to the bodies tissues |
| white blood cells | cells in the blood that help fight infection and provide immunity |
| platelets | small blood components that help in blood clotting to stop bleeding |
| coronary arteries | the arteries that supply oxygen-rich blood to the heart muscle itself. |