This heart anatomy diagram shows that blood flows from the ... (Photo Credit: iStock/Getty Images) The atria and ventricles work together, contracting and relaxing to pump blood out of the heart.

The heart is a complex organ with several chambers, valves, and tissues that work together to pump blood around the body. Electrical impulses regulate the timing of each heartbeat. Sometimes ...

Here’s how it works. The circulatory system consists of three independent systems that work together: the heart (cardiovascular), lungs (pulmonary), and arteries, veins, coronary and portal ...

The left and right sides of the heart work in unison. The atria and ventricles contract and relax in turn, producing a rhythmic heartbeat. The right side of the heart receives deoxygenated blood ...

Well, this is kind of a trick question. Your heart is actually a muscular organ. An organ is a group of tissues that work together to perform a specific function. In the case of your heart ...

Save guides, add subjects and pick up where you left off with your BBC account. Your heart first pumps blood to your lungs. Here, the blood picks up oxygen from the air that you have breathed in.