<prompt> SpermatogenesisStarts at birthMaximum in 37degCOccurs in seminiferous tubulesTime required for a spermatogonium to develop into mature spermatozoan is 6 weeks  <response>: i.e. Occurs in seminiferous tubules: 11-12-IBS-Embryology 8thSpermatozoa are formed in the walls of the seminiferous tubules of the testesSPERMATOGENESIS - formation of gametes spermatozoa takes only during the reproductive periods which begins at the age of puberty 12 to 16 years and continue even though old age The process of spermatogenesis, including spermiogenesis requires about two months for its completion.Difference between Spermatogenesis and SpermiogenesisSpermatogenesis is the complete process of formation of a spermatozoon from a spermatogonium. It includes first and second meiotic division and spermiogenesisSpermiogenesis - is the process of transformation of a rounded spermatid into a spermatozoanSERTOLI CELLSSertoli cells are specialized cells within the seminiferous tubules and are involved in the orchestration and coordination of all of the key events in spermatogenesis including spermiogenesisFunction of Sertoli cells1. Provide support, nutrition to developing spermatozoa2. Protect developing germ cells by forming the blood testes barrier BTB3. Secretion of important substances - Androgen binding protein ABP, Inhibin, Mullerian Inhibiting substance MIS, contain aromatase CYP4. Presence of FSH receptors5. Important role in the final maturation phase of spermiogenesis which is characterized by shedding of excess or residual cytoplasm of the spermatids Phagocytosis 