Which cells in the testis secrete testosterone?

Sertoli cells are found in

Even with the contraction of the spermatic cord,the testes of a man are not pulled into the abdominal cavity. This is due to which of the following structures?

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?

Write a note on male accessory glands.

Most mammals have a testis sac called the scrotal sac,which is for: