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 final step in the development of sperm is called spermiogenesis. In this process, the spermatids formed from spermatogenesis become mature spermatozoa, or sperm. The mature sperm cell has a head, midpiece, and tail.