Your circulatory system works all day, every day, to pump oxygen throughout your body. There are cardiovascular conditions that can impact this system. Your circulatory system, also known as your ...

Your heart is a muscular organ that helps circulate your blood, which delivers oxygen and nutrients to your tissues. There are four chambers and four valves in your heart, and each ensures proper ...

Both arteries and veins are types of blood vessels in the cardiovascular system. An artery carries blood away from the heart, and a vein carries blood back to the heart. Blood vessels are essential ...