960. THOSE WHO ARE IN THE PROVINCE OF THE KIDNEYS, AND SUCCENTURIATE KIDNEYS,* DRAW THE GROSSER THINGS TO THEMSELVES, AND THUS PURIFY THINGS WHICH MUST BE MADE PURER It can be known that the kidneys, both the urinary and the succenturiate, draw off to themselves unclean things - the kidneys the unclean things of the serum, and the succenturiate kidneys the more unclean things of the spirit of the blood. Therefore the spermatic vessels descend from the emulgent vessels. * The suprarenal bodies.