| A | B |
|---|
| Plasma | the liquid component of blood that carries blood cells and dissolved materials. |
| platelet | A particle that helps the blood clot |
| red blood cell | Transports oxygen to body cells and removes carbon dioxide from body cells. |
| hemoglobin | an iron-rich protein that helps transport oxygen and carbon dioxide in the blood. |
| white blood cell | a blood cell that attacks, surrounds, and destroys pathogens that enter the body and prevents them from causing infection. |
| pathogen | a germ that causes disease. |
| artery | a blood vessel that carries blood away from the heart. |
| coronary artery | supplies nutrients and oxygen to the heart muscle. |
| pulmonary artery | carries blood from the heart to the lungs, where it absorbs oxygen and releases carbon dioxide. |
| vein | a blood vessel that returns blood to the heart. |
| capillary | a tiny blood vessel that connects arteries and veins. |
| heart | A four-chambered muscle that continually pumps blood throughout the body. |
| atria | The two upper chambers of the heart. |
| ventricles | the two lower chambers of the heart. |
| aorta | the main artery in the body. |
| heart rate | the number of times the heart contracts each minute. |
| pulse | the surge of blood that results from the contractions of the heart. |
| blood pressure | the force of blood against the artery walls. |
