The kidneys of adult mammals are

Describe the human excretory system.

What are the correct dimensions (Length $-$ Width $-$ Thickness) for a kidney of an adult human?

In the kidney,the ureter,blood vessels,and nerves enter through the ..........

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.

The vessel leading blood (containing nitrogenous waste) into the Bowman's capsule is known as: