Which of the following veins has the least amount of urea?

What percentage of the total blood pumped by the heart goes to the kidneys?

Show the structure of a renal corpuscle with the help of a diagram.

Describe the structure of a human kidney with the help of a labelled diagram.

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: Nephrons are of two types: Cortical and Juxta-medullary,based on their relative position in the cortex and medulla.
Reason $R$: Juxta-medullary nephrons have a short loop of Henle,whereas cortical nephrons have a longer loop of Henle.
In the light of the above statements,choose the correct answer from the options given below:

In the given diagram,choose the correct option for the labelled parts $:-$