on the motion of the heart and blood

The heart is a muscular organ that pumps blood throughout the body, maintaining circulation. It has four chambers: two atria and two ventricles. Oxygen-rich blood from the lungs enters the left atrium, moves to the left ventricle, and is pumped out to the body. Deoxygenated blood returns to the right atrium, moves to the right ventricle, and is sent to the lungs for oxygenation. This process is continuous, ensuring that all body tissues receive oxygen and nutrients while removing waste products. The heart's rhythmic contractions are vital for sustaining life and overall health.