The part through which arteries and veins enter or leave the kidney is called:

The afferent and efferent arterioles are . . . . . . .

Select the correct statements from the following.
$(i)$ Renal papilla is a narrow tip of the medullary pyramid.
(ii) Renal cortex is red-coloured and striated.
(iii) Longitudinal-circular-longitudinal arrangement of smooth muscles is observed in the renal pelvis at its origin.
(iv) Ureter is a long,non-muscular hollow tube that communicates with the renal pelvis at its origin.

Part of the kidney through which the ureter, blood vessels and nerves enter is

Which of the following is $NOT$ a part of the renal pyramid?

$A$ well-developed Loop of Henle is found in: