Kidneys of mammals are present on either side of the vertebral column at the level of:

Select the correct sequence of blood flow in the kidney.

Read the following four statements $(A-D)$ and select the correct ones:
$(A)$ The medulla of the kidney is divided into a few conical masses projecting into the calyces.
$(B)$ The cortex of the kidney extends in between the medullary pyramids as renal columns called columns of Bertini.
$(C)$ The kidneys are situated in the ventral part of the thoracic region in the human body.
$(D)$ Each kidney of an adult human measures $10-12 \ cm$ in length,$5-7 \ cm$ in width,$2-3 \ cm$ in thickness,with an average weight of $120-170 \ gm$.

Which blood vessel contains the least amount of urea?

Malpighian body or renal corpuscle is

In the kidney of the rabbit,the $Loop$ of $Henle$ is the part of: