Introduction. The rat has long been an important model of mammalian spermatogenesis, and the histological process of rat male germ cell differentiation is well understood [].An overview of the differentiation program is shown in Fig 1A.Spermatogonial stem cells (SSCs) form the basis for lifelong sperm production as they can both self-renew and differentiate into all germ cell types. In animal sexual reproduction, spermatogenesis and oogenesis are two forms of reproductive divisions. The primary distinction between spermatogenesis and oogenesis is that spermatogenesis is the process of producing sperms from male germ cells (spermatogonia in men), whereas oogenesis is the process of producing eggs from female germ cells (oogonia in females).
The immature cells (called spermatogonia) are all derived from cells called stem cells in the outer wall of the seminiferous tubules. The stem cells are composed almost entirely of nuclear material. (The nucleus of the cell is the portion containing the chromosomes.) The stem cells begin their process by…. Read More. In testis: Spermatogenesis.
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  • difference between spermatogenesis and spermatogonia