Where does secondary urine accumulate?

Secondary urine is a liquid that is formed during the processing of primary urine in the body. It accumulates in the ureter. Then the human bladder passes. Likewise, in many animals, urine accumulates in the bladder. It is produced by the kidneys during the blood filtration process. With the help of it, all unnecessary substances from the blood are removed from the body. These are salts, organic matter, excess water and more. During the filtration process, the kidneys process a huge amount of blood. About 170 liters of blood a day pass through them.