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The ventricles of the heart function to pump blood to the entire body.Papillary muscles in the ventricle walls control the opening and closing of the tricuspid valve and mitral valve.Blood returning to the heart from the lungs enters the left atrium and passes through the mitral valve to the left ventricle.During the diastole phase of the cardiac cycle, the atria and ventricles are relaxed and the heart fills with blood.During the systole phase, the ventricles contract pumping blood to the major arteries (pulmonary and aorta).Right ventricle: Receives blood from the right atrium and pumps it to the main pulmonary artery.The pulmonary artery extends from the right ventricle and branches into the left and right pulmonary arteries.

The ventricles of the heart function to pump blood to the entire body. During the diastole phase of the cardiac cycle, the atria and ventricles are relaxed and the heart fills with blood. During the systole phase, the ventricles contract pumping blood to the major arteries (pulmonary and aorta). The heart valves open and close to direct the flow of blood between the heart chambers and between the ventricles and major arteries. Papillary muscles in the ventricle walls control the opening and closing of the tricuspid valve and mitral valve.

Right ventricle: Receives blood from the right atrium and pumps it to the main pulmonary artery. Blood passes from the right atrium through the tricuspid valve into the right ventricle. Blood is then forced into the main pulmonary artery as the ventricles contract and the pulmonary valve opens. The pulmonary artery extends from the right ventricle and branches into the left and right pulmonary arteries. These arteries extend to the lungs. Here, oxygen-poor blood picks up oxygen and is returned to the heart via the pulmonary veins.
Left ventricle: Receives blood from the left atrium and pumps it to the aorta. Blood returning to the heart from the lungs enters the left atrium and passes through the mitral valve to the left ventricle. Blood in the left ventricle is then pumped to the aorta as the ventricles contract and the aortic valve opens. The aorta carries and distributes oxygen-rich blood to the rest of the body.