The pump of the cardiovascular system is the Heart. The heart is one of the most important, complex, and fascinating organs in your body. Organs are individual tissue components that help meet the needs of an entire organism (that’s you). The heart’s primary function is to systematically pump blood to tissues in all areas of the body to keep us alive! The pulmonary circulatory system pumps blood to our lungs and is a low-pressure system managed by the right side of the heart. The peripheral circulatory system pumps blood to all the peripheral organs and is a high-pressure system managed by the left side of the heart. The heart works hard for us and has four chambers to help manage the load. The left and right atria chambers are responsible for filling the left and right ventricle chambers with blood before every heartbeat. The ventricles are the true pump. In fact, the left ventricle does so much work, it is the site of most heart attacks. Dr. Crooke covers the flow of blood through the chambers, the electrical system that causes the heart to beat, how the autonomic nervous system controls heart rate and more!