Which terms for P, Q, R, S, T, U, and V will make the following paragraph true?
The human excretory system consists of kidneys, ureters, __P__ and __Q__. The __R__ brings the dirty blood into kidneys. Kidneys remove the poisonous substances urea, salt and extra water from the body. The cleaned blood is carried away from the kidneys by __S__. __T__ is the tube that carries urine from the kidney to the __U__. The urine collected in the bladder is passed out of the body through the __V__.