Where does the process of spermatogenesis take place?

Which of the following cells are present in mammalian testes and help to nourish sperms?

After the first meiotic division,the primary spermatocyte differentiates into .........

How many primary follicles are left in each ovary in a human female at puberty?

When a male ejaculates sperms during coitus,for normal fertility,at least ....... percent of sperms must have normal shape and size,and at least ........... percent of them must show vigorous motility.

Which of the following layers in the human female follicle is acellular?