This organ is responsible for regulating red blood cell counts as it releases erythropoietin, and it also controls arterial pressure through the hormones renin and angiotensin.
Blood vessels and nerves supplying it pass through a structure called the hilum. It is the site of calcitriol synthesis, which is required for proper calcium absorption and deposition. Its principal units are fed by arcuate arteries and veins, and its byproduct is released during micturition. This organ is responsible for regulating red blood cell counts as it releases erythropoietin, and it also controls arterial pressure through the hormones renin and angiotensin. The macula densa is found in this organ adjacent to the juxtaglomerular apparatus. Its inner medulla contains the duct of Bellini and the thin loop of Henle, while its cortex contains nephrons. For ten points, name this filtration organ responsible creating urine.
Blood vessels and nerves supplying it pass through a structure called the hilum.
{kidney}