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CHAP. XXX. Of the Vreters.
NOw it seemes sit to speak of the Vreters, bladder, and parts belonging to the bladder. Therefore the Vreters are of a spermaticke, white, * 1.1 dense and solid substance, or an indifferent bignes in length and thick∣nes. Their figure is round and hollow. They are composed of two coats, one proper consisting of right and transverse fibers, which comes from the emulgent veines and arteries; the other common from the Peritonae∣um; besides they have veines, nerves and arteryes from the Neighbouring parts.
They be two in number on each side one; They are scituate between the Kidneyes * 1.2 (out of whose hollow part they proceed) and the bladder. But the manner how the Vreters insert or enter themselves into the bladder, and the Porus Cholagogus into the Duodenum, exceedes admiration; for the ureters are not directly but obliquely implan∣ted neere the orifice of the bladder & penetrate into the inner space thereof; for with∣in they doe as it were divide the membrane or membranous coat of the body of the bladder, and inflnuate themselves into that, as though it were double. But this is opened at the entrance of the urine, but shut at other times, the cover as it were falling upon it, so that the humor which is falne into the capacity of the bladder cannot bee forced or driven backe, no not so much as the aire blowne into it can come this way out, as we see in swines bladders blowne vp and filled with aire.
For wee see it is the Aire contained in these which fills them thus, neither canne it bee pressed forth but with extraordinary force.
For as this skinne or coat turned in by the force of the humor giues way, so it being pressed out by the body conteined within, thrusts its whole body into the passage as a stopple; like to this is the insertion of the Porus Cholagogus into the Guts.
The ureters have connexion with the above mentioned parts, with the muscles * 1.3 of the loines; upon which they runne from the Kidneyes to the bladder.
Wherefore nothing hinders, but that the stone sliding through the ureters into the bladder, may stupify the thigh as much as it did when it was in the Kidney. They are of a cold and dry temper.
Their use is, to serve as passages, or channels for carrying the urine into the * 1.4 bladder.