Which of the following cells secrete testicular hormones called androgens and form the endocrine part of the testis?

Identify the diagram given below.

In which of the following organisms do the testes descend into the scrotum during the breeding season but move back into the abdominal cavity during the non-breeding season?

What is the correct shape and length of the human testis?

The prostate gland surrounds the $A$. It produces a milky, slightly alkaline solution which forms $B$ volume of the semen. The secretion contains $C$ acid and enzymes (acid phosphatases, amylase, pepsinogen, and prostaglandins). $A$, $B$, and $C$ in the above statement are:

Write a note on the transport and formation of sperms.