Which chamber of the heart receives blood from the ventilation of the systemic circulation?

Oxygen-depleted blood, which has given it to the organs and tissues of the body, is collected in the two largest venous vessels – the superior and inferior vena cava.

They open into the right atrium, after the contraction of which blood is ejected through the tricuspid valve into the right ventricle, then into the pulmonary trunk, two pulmonary arteries, the lungs for oxygenation (through the capillary network due to the difference in partial pressure).