| A | B |
|---|
| circulatory system | delivers food and O2 to body cells, and removes CO2 and waste |
| atriums | 2 collecting chambers in upper part of heart for blood returning from the body to the heart. |
| ventricles | found in lower heart; a pumping chamber to pump blood to lungs or body |
| arteries | carry blood away from heart |
| capillaries | thin walled blood vessels that release O2 to body and take wastes from body cells to excretory system |
| veins | carry oxygen poor blood back to heart |
| plasma | fluid portion of blood, composed of 90% water, the rest is sugar, fat, salt, gas, and plasma proteins |
| plasma proteins | regulate water entering and leaving blood, fight disease, and help with clotting |
| 4 main components of blood | Red blood cells, white blood cells, platelets, plasma |
| Red Blood Cells (RBCs) | carry O2 through body and are produced in bone marrow. Only have nucleus for short time |
| hemoglobin | iron containing protein found in RBCs |
| White Blood Cells (WBCs) | larger than RBCs, have a nucleus for all of their life, fight disease |
| platelets | cell fragment in blood, aids in clotting |
| fibrin | chemical in blood, forms a net across a cut in blood vessel to help clot blood |
| cardiovascular disease | disease that affects heart and blood vessels |
| atherosclerosis | thickening of inner wall of an artery, slows blood flow. ex build up of cholesterol |
| hypertension | high blood pressure, increased blood pressure causes heart to work harder and causes leaks in blood vessels |
