On the Workmanship of God or the Formation of Man

For the parts of the intestines which receive the food and drink from the belly are more open than the other coils, and much more delicate. These entwine themselves around and encompass the bladder; and when the meat and the drink have arrived at these parts in a mixed state, the excrement becomes more solid, and passes through, but all the moisture is strained through those tender parts, (11) and the bladder, the membrane of which is equally fine and delicate, absorbs and collects it, so as to send it forth where nature has opened an outlet