Which pathway is the largest of the circulatory system

Aorta, the Superior Vena Cava, and the Inferior Vena Cava.

The circulatory system is a organ system which is responsible for disseminating and collecting nutrients and wastes all over the body. It also functions to pass through the kidneys which filter out toxic and other antibodies which if isn't filtered can have insidious effects on the body. The circulatory system has the heart, blood vessels and the different transporting cells mainly the red blood cells. The Aorta is the largest artery in the system while the vena cavas are the largest veins.