Spermatogenesis.
The development of male gametes (spermatids) from spermatogonia is called spermatogenesis.
Spermatogonia are located beneath the basement membrane, which surrounds each seminiferous tubule. Each spermatogonium is attached to an adjacent Sertoli cell by specialised membrane junctions.
Spermatogonia undergo mitosis to form primary Spermatocytes. Each primary spermatocyte undergoes the first meiosis to form two secondary spermatocytes. Each secondary spermatocyte undergoes a second meiosis to form two spermatids (Figure 1).
As each division takes place, the daughter cell migrates closer to the lumen of the seminiferous tubule, so that spermatids are immediately adjacent to the lumen. This is the process that converts spermatids into mature sperm (spermatozoa).
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