The enlarged end of the penis is called the ..........

Which is the primary sex organ in males?

What is the process of circumcision?

Given below is a diagram of the $T.S.$ of a testis. Select the option which gives the correct identification of the function of cells labeled $A, B, C,$ and $D$ from the options given below.
$A$ - cells undergo spermatogenesis to produce spermatozoa.
$B$ - cell responsible for the development of male secondary sexual characters.
$C$ - heads of sperms remain attached to these cells.
$D$ - haploid male gamete.

What does the $Vasa$ $efferentia$ contain?

The glans penis is formed by which of the following?