| A | B |
| myocardium | the muscle of the heart |
| septum | the divides the two sides of the heart |
| atrium | the upper chambers of the heart |
| ventricle | lower chambers of the heart |
| artery | blood vessels that carry blood away from the heart |
| vein | blood vessels that carry blood to the heart |
| capillaries | the smallest blood vessels |
| plasma | the fluid in which other parts of blood are suspended |
| hemoglobin | the oxygen carrying part of the red blood cells |
| red blood cells | carry the oxygen |
| white blood cells | fight infection |
| platelets | smallest type of blood cells, help blood clot |
| lymphatic system | helps fight infectiion and drains tissue fluid back into the bloodstream |
| lymph | clear yellow fluid that fills the spaces around body cells |
| lymphocytes | white blood cells |
| congenital heart disease | one that occurs at birth |
| heart murmur | sound made when the valves are week |
| varicose veins | swollen and enlarged veins, usually in legs |
| anemia | concentration of hemoglobin in the blood is below normal |
| leukemia | a type of cancer in which the white blood cells are produced abnormally in the bone marrow |
| hemophelia | an inherited bleeding disorder |
| Hodgkin's Disease | a cancer of the lymph tissue |
| tonsillitis | inflammation of the tonsils |