Which part labelled in the figure forms a part of the circulatory system?
The renal arteries carry a large portion of total blood flow to the kidneys. Up to a third of total cardiac output can pass through the renal arteries to be filtered by the kidneys.The renal artery, the afferent arteriole, entering the small cup-like space of the Bowman’s capsule as a network of blood capillaries. Thus, the correct answer is the option A.