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.
< br / > Spermatogenesis is the development of mature spermatozoa ( sperm cells ) from spermatogonia ; it includes spermatocytogenesis and spermiogenesis. < br / > < br / > < ul > < li > In the testes there are seminiferous tubules < / li > < li > Seminiferous tubule surrounded by epithelium < / li > < li > On epithelium are SPERMATOGONIA cells < / ...