What is the part of the heart that squeezes blood into arteries?

The part of the heart that squeezes blood into the arteries is the ventricle. Specifically, the left ventricle pumps oxygenated blood into the aorta, distributing it throughout the body, while the right ventricle pumps deoxygenated blood into the pulmonary arteries toward the lungs for oxygenation. The contraction of the ventricles is a crucial part of the cardiac cycle, ensuring efficient circulation.