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
Trade route from the Varangians to the Greeks Though this has come to mean "Vikings" to many, the term for the Byzantines meant all Scandinavians and their kindred living in what is now Russia. The route was probably established in the late 8th and early 9th centuries, when Varangian explorers searched for plunder but also for slaves and lucrative goods. The route gained significant importance from the 10th until the first third of the 11th century, concurrently with the Volga trade route and the trade route from the Khazars to the Germans. According to Constantine VII, the Krivichs and other tribes dependent on Kiev transported hollowed-out sailboats, or