Immature male germ cells (also called as
spermatogonia) produce sperms in the process of
spermatogenesis. Spermatogonia proliferate continuously
by mitotic divisions around the outer edge of the
seminiferous tubules, next to the basal lamina. Some of these
cells stop proliferation and differentiate into primary
spermatocytes. After they proceed through the first meiotic
division, two secondary spermatocytes are produced. The
two secondary spermatocytes undergo the second meiotic division to form four haploid spermatids. These spermatids
differentiate morphologically into sperm by nuclear
condensation, ejection of the cytoplasm and formation of
the acrosome and flagellum.