Polish Society of Nephrology Polish Society of Nephrology Polish Society of Nephrology (PSN; Polish: Polskie Towarzystwo Nefrologiczne) – non-profit medical-scientific association, established in 1983, with a current headquarters in Warsaw that unites nephrologists, physicians and other scholars, experts and professionals in the fields of kidney diseases, dialysis therapy and renal transplantation. Polish Society of Nephrology was established during the First Funding Congress, which was held in September 1983 in Bydgoszcz and registered in the District Court in Łódź. To that time there were two separate societies gathering doctors and other health care professionals specialized in kidney diseases - Nephrology Committee of the Polish Academy
Circumventricular organs that information neurally to other brain regions. Through their neural circuitry, they provide direct information to the autonomic nervous system from the systemic circulation. The secretory organs include the subcommissural organ (SCO), the pituitary gland, the median eminence, and the pineal gland. These organs are responsible for secreting hormones and glycoproteins into the peripheral blood using feedback from both the brain environment and external stimuli. All of the circumventricular organs, except the subcommissural organ, contain extensive vasculature and permeable capillaries which define a sensory and secretory system within the brain. Furthermore, all CVOs contain neural tissue, enabling a neuroendocrine role.