The primary function of the left ventricle is to pump oxygenated blood from the heart to the entire body through the systemic circulation. It receives oxygen-rich blood from the left atrium and contracts to push this blood through the aortic valve into the aorta, supplying all body tissues with oxygen and nutrients. The left ventricle has thick muscular walls that allow it to generate the high pressure needed to maintain this blood flow effectively. This process ensures sufficient cardiac output to meet the body's needs.
