Keywords heart anatomy, fluorography, venous catheterization, blood flow, cardiac cycle, right atrium, left atrium, coronary arteries, selective opacification, physiological data Email us at ...

Let's get straight to the heart of the matter—the heart's job is to move blood. Day and night, the muscles of your heart contract and relax to pump blood throughout your body. When blood returns ...

The semilunar valves stop the back flow of blood into the heart. There is a semilunar valve where the aorta leaves the left ventricle and another where the pulmonary artery leaves the right ventricle.

For example, a capillary is microscopically thin to allow gases to exchange, the arteries are tough and flexible to cope with high pressure blood flow and ... away from the heart (usually ...