Reproductive system

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A Great game to learn the reproductive system

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sperm cells

spermatogenesis

reproductive organs

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Chastity Grimes

United States

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Compléter Reproductive systemVersion en ligne A Great game to learn the reproductive system par Chastity Grimes 1 46 secondary male sperm Spermatogenesis epididymis 23 tubules chromosomes 74 cytoplasm transported chromosomes , the origin and development of the cells within the male reproductive organs , the testes . Within the walls of the , also , are many randomly scattered cells , called Sertoli cells . One immature germ cell takes as long as days to reach final maturation , and during this growth process there are intermittent resting phases . The primary sperm cells then develop somewhat by increasing the amount of ( substances outside of the nucleus ) and structures called organelles within the cytoplasm . n the nucleus of the primary sperm cells there are ; in each of the sperm cells there are only , as there are in the egg . Once the sperm has matured , it is through the long seminiferous tubules and stored in the of the testes until it is ready to leave the body .