Testicle fetal abdomen to the inguinal ring and beyond to the inguinal canal and into the scrotum. In most cases (97% full-term, 70% preterm), both testes have descended by birth. In most other cases, only one testis fails to descend (cryptorchidism) and that will probably express itself within a year. The testes grow in response to the start of spermatogenesis. Size depends on lytic function, sperm production (amount of spermatogenesis present in testis), interstitial fluid, and Sertoli cell fluid production. After puberty, the volume of the testes can be increased by over 500% as compared to the pre-pubertal size. Testicles are
From the Earth to the Moon (especially cannons), comes together when Impey Barbicane, its president, calls them to support his latest idea. He's done some calculations, and believes that they could construct a cannon capable of shooting a projectile to the moon. After receiving the support of his companions, another meeting is held to decide the place from which the projectile will be fired, the dimensions and materials of both the cannon and the projectile, and which kind of powder they are to use. An old enemy of Barbicane, a Captain Nicholl of Philadelphia, designer of plate armor, declares that the entire enterprise is absurd and