Vitamins: essential organic nutrients, required in small amounts, that cannot be synthesized by the body. Required for growth, maintenance, reproduction and lactation. Vitamin deficiency: decline in health due to the lack of a vitamin in a ration.itamins: essential organic nutrients, required in small amounts, that cannot be synthesized by the body. Required for growth, maintenance, reproduction and lactation. Vitamin deficiency: decline in health due to the lack of a vitamin in a ration.
Spermatogenesis is the process by which the male gametes, called sperm, are created. Spermatogenesis takes place in the seminiferous tubules, which are an intricate system of tubules in the testes where spermatogenesis takes place.
The seminiferous tubules of the testes are the starting point for the process, where stem cells adjacent to the inner tubule wall divide in a centripetal directionâbeginning at the walls and proceeding into the innermost part, or lumen âto produce immature sperm. Maturation occurs in the epididymis.permatogenesis takes place within several structures of the male reproductive system. The initial stages occur within the testes and progress to the epididymis where the developing gametes mature and are stored until ejaculation.