The Leydig cells as found in the human body are the secretory source of

The head of the epididymis,which is located on the anterior part of the testis,is known as:

$A$: Failure of testes to descend into the scrotum causes sterility in man. $R$: Higher internal body temperature is not suitable for sperm development.

Cowper's glands are present in

Which gland/structure secretes the male sex hormone?

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