MICROANATOMY

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: -Right atrium of the heart receives deoxygenated blood from the body. This deoxygenated blood is collected by a system of venules, veins and vena cava and emptied into the right atrium.

Detailed explanation-3: -Together, your superior vena cava and inferior vena cava collect deoxygenated blood from your whole body and bring it back to your heart for new oxygen. This is why the vena cava veins are the largest veins in your body.

Detailed explanation-4: -Generally, veins carry deoxygenated blood from the body to the heart, where it can be sent to the lungs.