The normal blood flowing through the renal arteries in a human being is about

Identify the wrong statements about the human excretory system and choose the option accordingly.
$I.$ Kidneys are reddish-brown and bean-shaped structures.
$II.$ Kidneys are situated between the last thoracic and third lumbar vertebrae.
$III.$ Each kidney of an adult human measures $10-12 \, cm$ in length,$5-7 \, cm$ in width,$2-3 \, cm$ in thickness,and has an average weight of $120-170 \, g$.

If one kidney is removed from a human body,then:

Which of the following enters the hilum of the kidney?

In $....... P .......$ type of nephrons, the loop of Henle is too short. In $....... Q .......$ type of nephrons, the loop of Henle is very long. Choose the correct option for $P$ and $Q$.
$P \quad Q$

Which of the following correctly explains the function of a specific part of the human nephron?