the kidneys are bean-d organs. structures.

abdominal acid acids acute along amino ammonium anatomy are balance banner base bean beanshaped bladder blood cavity chronic cysts disease diseases electrolytes enzyme erythropoietin essential fluid function glucose homeostasis homeostatic hormones human illustration injury kidney kidneys main maintaining metabolism molecules nephritic nephrology nephrotic nitrogenous organic organs pressure products regulate regulatory renal renin roles serve several spine structures syndromes system that their tract urinary urine vertebrates waste water