So, a rteries carry oxygenated blood a way from the heart, veins carry deoxygenated blood ... the lower the resting pulse rate, the fitter they are. During exercise, the muscle cells need more ...

The portal vein and its tributaries carry blood to the liver first, allowing the liver to process nutrients and neutralize ...

Deep vein thrombosis (DVT) is a blood clot (thrombus) in a deep vein, usually in the legs. These clots require medical care right away. These clots are dangerous because they can break loose, travel ...