The kidneys are bean-shaped organs that are reponsible for many important organic molecules in vertebrate kidneys remove excess out. The function of the kidneys is know to drive waste of metabolism. Kidneys are vital organs in the urinary system and is reponsible for maintaining balance. Kidneys act as filters for the blood naturally. The waste that is soluble in water. Which will be delivered to the bladder. The kidneys produce urine excretion of waste.