Sertoli cells are found in

The epididymis leads to $...A...$ that ascends to the abdomen and loops over the $...B....$ Here $A$ and $B$ refer to:

In the urinogenital system of a rabbit, which of the following is present in the male but absent in the female?

$A$: Occasionally,mammary glands are functional in males,and the condition is called gynaecomastia.
$R$: Decreased testosterone in later life may also lead to gynaecomastia. It is usually due to the perturbation of the estrogen-to-androgen ratio.

Which of the following structures is found within the inguinal canal?

The Leydig's cells secrete