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Overview of the Heart

The heart is a muscular organ that acts as the center of the circulatory system. The human heart is about the size of a closed fist and is located slightly off-center in the chest cavity, between the lungs and behind the breastbone.

Exploring the Functionality and Structure of the Heart

The primary function of the heart is to circulate or distribute blood throughout the body, supplying cells and tissues with oxygen and nutrients. It also helps remove waste products and carbon dioxide. To accomplish this, the heart performs the following functions:

Pumping Action:The heart muscle contracts and relaxes rhythmically to pump blood throughout the body. During each heartbeat, the heart's chambers (atria and ventricles) contract (systole) to push blood out of the heart into the arteries and relax (diastole) to allow blood to flow into the heart from the veins.

Blood Circulation:The heart circulates blood through two distinct pathways: the pulmonary circulation and the systemic circulation.