Identify the odd one out.

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

Which of the following enters the hilum of the kidney?

How many nephrons are present in each kidney?

Draw a labeled diagram showing the various parts of the human excretory system.

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.