Which heart chamber pumps blood to the body?

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Pumping blood to the body is done by the left ventricle. It receives oxygen-rich blood from the left atrium and sends it into the aorta, from which blood travels to every tissue in the body. The left ventricle has a thick muscular wall because it must generate high pressure to overcome the resistance of the entire systemic circulation. The other chambers have different roles: the right ventricle pumps blood to the lungs for oxygenation, while the atria receive blood from the body and lungs and pass it to the ventricles.