n. A diploid cell that undergoes meiosis to form four spermatids. A primary spermatocyte divides into two secondary ... Nucleus of Sertoli cells and germ cells (spermatogonia type A, pachytene primary spermatocyte and round spermatid) were counted ... a male sex cell that gives rise by meiosis to a pair of haploid cells, which become the reproductive cells. ... cells in the walls of some tubules and necrotic spermatogenic cells with eosinophilic cytoplasm and pyknotic nucleus were ...