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.
Main Difference â Spermatogenesis vs Oogenesis. Spermatogenesis and oogenesis are two types of reproductive divisions found in the sexual reproduction of animals. Reproductive division, also called gametogenesis, occurs in the germ cells in gonads by meiosis. It is involved in the production of gametes. Diploid germ cell produces haploid gametes.