This schematic illustrates the organization of blood vessels and the regulation of blood flow (arrows) in the palm of the hands. Arteriole-venule shunts are small muscular valves that connect ...

All blood vessels are specifically ... at high pressure as it leaves the heart; the largest artery is the aorta Contain valves to prevent back flow of blood Walls are made of semi-permeable ...

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 ...

All blood vessels are specifically ... at high pressure as it leaves the heart; the largest artery is the aorta Contain valves to prevent back flow of blood Walls are made of semi-permeable ...