Which muscles are present in the wall of the urinary bladder?

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

Both the kidneys of human are not in the same plane and axis. This is due to the presence of

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

Each nephron has two parts, which are

Choose the correct statement.