Which chamber pumps blood into the aorta?

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Illustration of a human heart cross-section showing four chambers-left and right atria and ventricles-with labeled major blood vessels. An inset highlights cardiac muscle tissue, showing myocytes and intercalated disks. — human cardiovascular system The human heart is both a pump and a muscle. Its four chambers move blood efficiently, while cardiac muscle cells joined by intercalated disks synchronize each contraction.

The chamber that pumps blood into the aorta is the left ventricle.12

The left ventricle is the left inferior portion of the heart and possesses walls that are three times as thick as those of the right ventricle, allowing it to force oxygenated blood through the aorta to all parts of the body except the lungs. The aortic valve is situated between the left ventricle and the aorta, opening to allow blood to depart the ventricle and closing to prevent backflow.12