The testis produces:

"Testes are extra-abdominal in position". Which of the following is most appropriate reason?

In humans, the testes are located outside the abdominal cavity within the scrotum. What is the purpose of this arrangement?

$A$: The secretions of male accessory glands constitute the seminal plasma,which is rich in fructose,calcium,and certain enzymes. $R$: Fructose serves as a source of energy for the sperms.

The given figure shows the male reproductive system of a human. Select the correct set for the labeled parts $A, B, C$ and $D$.

In vasectomy, a small part of which of the following is cut for sterilization?