Question

Why are cortical nephrons present?-- if there is no vasa recta, then there willl be no selective reabsorption. Then won't juxta medullary nephrons be more efficient?

Answer 1

Cortical nephrons are the major type of nephrons present in kidney, about 80% of the total nephrons. They are essential as perform the major excretory and regulatory function of the kidney.

Cortical nephrons and juxtamedullary nephrons are similar in structure, except the length of the loop of henle.