ANATOMY

Detailed explanation-1: -Oxygen-poor blood returns from the body to the heart through the superior vena cava (SVC) and inferior vena cava (IVC), the two main veins that bring blood back to the heart. The oxygen-poor blood enters the right atrium (RA), or the right upper chamber of the heart.

Detailed explanation-2: -What does the vena cava do? Your superior vena cava and inferior vena cava have the important function of carrying oxygen-poor blood to your heart’s right atrium, where it moves into your right ventricle and then to your lungs (through your pulmonary artery) to trade in carbon dioxide for oxygen.

Detailed explanation-3: -Vena Cavae The inferior vena cava carries deoxygenated blood from the tissues below the diaphragm. It passes through the diaphragm via the caval opening at the level of T11, the most superior of the diaphragmatic openings.

Detailed explanation-4: -The right atrium receives deoxygenated blood from systemic circulation through the superior vena cava and inferior venae cavae.