AP BIOLOGY

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.

Detailed explanation-2: -Two large veins that lead into the heart are the superior vena cava and inferior vena cava. (The terms superior and inferior don’t mean that one vein is better than the other, but that they’re located above and below the heart.)

Detailed explanation-3: -The vena cava are also called the “central veins". Central venous catheters are inserted with the tip in or close to the superior of inferior vena cava. Blood is pumped from the right side of the heart into the blood vessels of the lung.

Detailed explanation-4: -Arteries carry blood away from your heart. Veins carry blood back toward your heart. Capillaries, the smallest blood vessels, connect arteries and veins.