what is the pulmonary circulation?
<answer> It is the movement of blood from the heart to the lungs for oxygenation, then back to the heart again . <context> Pulmonary circulation is the movement of blood from the heart to the lungs for oxygenation, then back to the heart again . Oxygen-depleted blood from the body leaves the systemic circulation when it enters the right atrium through the superior and inferior venae cavae.