The kidneys of adult mammals are

Draw a neat and labelled diagram of the human excretory system.

The primary or main excretory organ in humans is:

The amount of blood filtered by both kidneys per minute is equal to what fraction of the blood pumped out by each ventricle of the heart in one minute?

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: Nephrons are of two types: Cortical and Juxta-medullary,based on their relative position in the cortex and medulla.
Reason $R$: Juxta-medullary nephrons have a short loop of Henle,whereas cortical nephrons have a longer loop of Henle.
In the light of the above statements,choose the correct answer from the options given below:

The $pH$ value of human urine is: