Kidneys lie outside the peritoneum,hence they are called

The following figure shows the human excretory system. Identify $P$ and $Q$.
$P \quad Q$

Podocytes are the cells present in

The $Bellini$ ducts transport which of the following?

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 $120-170 \ gm$.

The wide funnel-shaped space inside the hilum of the kidney is called the .....