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

The weight of a human kidney is approximately ....... grams.

Mention the location,size,and weight of the kidney.

The figure shows the human urinary system with structures labelled $A$ to $D$. Select the option which correctly identifies them and gives their characteristics and/or functions.

$I.$ Ureter,$II.$ Renal pelvis,$III.$ Calyx,$IV.$ Urinary bladder,$V.$ Urethra. Choose the correct sequence of the urine route to the outside.

Cortical nephrons are ...... in number compared to juxtamedullary nephrons.