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
Emergency medical services in the Netherlands The exceptional level of training permits what is, for the most part, independent practice, conducted according to a set of National Emergency Care Protocols, issued by the Dutch Ambulance Institute, and reviewed and revised every four years. Medical oversight for protocol compliance is conducted by each service's Medical Manager, who is a licensed physician. On those occasions when the patient's condition actually exceeds the paramedic protocols, the paramedic has the option of either calling their own Medical Manager for additional instructions, or requesting the response of a mobile medical team. All ambulances are staffed by a crew of two. These