Blood flows out from which heart chamber into the aorta?

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Blood flows out into the aorta from the left ventricle. The left ventricle contracts forcefully, pushing blood through the aortic valve into the ascending aorta so it can be distributed to the rest of the body via the systemic circulation. The left ventricle has a thick muscular wall to generate the high pressure needed for this circulation. By contrast, the right ventricle pumps blood to the lungs via the pulmonary artery, the left atrium receives oxygenated blood from the lungs, and the right atrium receives blood from the body.