they arise by continuation from the Seminary Vessels, so that both the Praeparatory Vessels, and the Parasta∣tae, and the Out-carrying Vessels, are but one continu∣ed Body, receiving divers Names according to its dif∣ferent Parts, and their respective Offices and Situati∣ons.
But Walaeus conceives, that it is more suitable to what appears in Dissection, to say, that these Vessels do not arise from the praeparatory Vessels, but are ra∣ther mixed with them, fastned to, and opened into them: and that as he supposes, to the end that the blood forced in by the Praeparatory Vessels, may deposite that Matter which it contains fit to breed seed, into the little branches of the Vasa deferentia. But the rest of the blood, which is unfit for Nutrition and Generation of Seed, is by other Anastomoses shed into the Veins, and by Circulation returns to the Heart.
Now they have their Original from the stones. by means of innumerable small Pipes or white Fibres. And there is no communion at all between the Vessel that carries away the Seed, and the Veins, and Arteries of the stones, which Vesalius conceives to be apparent in Dissections. Yet are they fastned to the inmost Coat of the stones, though they have a proper Coat of their own.
The Use of the Parastatae, is to perfect and finish the seed, by a power which they receive from the stones. Moreover, while the seed abides in them, it comes to pass that vehement and frequent Lust is not provoked.
The Ejaculatory or squirting Vessels, are simply ter∣med the Middle, because they carry seed from the stones and the Corpora varicosa, to the seminal bladders: for they are seen to carry a whiteish Humor, yea and the Parastatae are frequently found full of seed.
They have a Substance white and nervous; and their Figure is round and long: They have an obscure Cavi∣ty, because the seed by means of the spirits whereof it is full, does easily pass.
Their Situation is partly in the Cod, partly in the Cavity of the Belly, above the Os pubis or Share-bone. For they are carried upwards, and are knit to the Prae∣paratory Vessels, by a thin Membrane, and so pass a∣long to the Flanks and the Share-bone, which for that cause have a slight Cavity. And afterwards being tur∣ned back downwards, they are carried above the Ure∣ters, and under the hinder part of the Bladder, above the rectum Intestinum, they are on each side widened at the Neck of the Bladder, where
Their End is, and these Vessels so widened do con∣stitute
The seminary Bladders, which are ma∣ny in number like little Cells, and seem to make on each side one remarkable, great, and winding one, because one goes into another, which you cannot compare to any¦thing better then to a bunch of Grapes. The Cavities do neatly represent the Cells of a Pomegranate in or∣der and figure. Rondeletius did first of al describe these Bladders, and after him Fallopius. These nervous Bladders are seated between the Ligaments of the Piss∣bladder and the Arse-gut, by the sides of the deferent Vessels, a little before the said Vessels grow thick, and unite.
Their Use is, to contain the seed being wrought, and to reserve the same til time of Copulation, so that there may be seed sufficient to beget many Children. And therefore that •…•…ouder which A∣ristotle relates of a Bull that engen∣dred after his sto••••s were cut off: though others attribute this effect to the Prostatae, as Archangelus and Columbus. Now the seed may be con∣tained in these Cells many months together, and in re∣gard of the multitude of these little Bladders, seed may be voided in many Acts of Copulation; and all not spent at one Essay.
And that seed is contained in these little Bladderkies, besides the Autho∣rity of Fallopius, Platerus, Laurentius, Aquapendent, and Casserius, it is mani∣fest by this Experiment: If you squeez them, presen∣tly feed is forced into the Pipe of the Yard, just like Milk out of the Dug, or piss out of the Piss-bladder, &c. But if you press the Prostatae with your finger, yet nothing comes away, unless you press the Bladders also. And that the seed does not con∣tinually distil and drop out of them, into Urinary pas∣sage, a little Caruncle hinders, which stops their hole▪ The perpetual seat of a virulent Gonorrhaea, hath been by the Observation of late Anatomists found to be in these Bladders, for upon Dissection there hath been found an evident Imposthumation in these parts. From the situation of these Bladders and of the stones, with∣out the Cavity of the Abdomen, Riolanus would give a reason why men are not so cruelly infested with the filthy vapors of corrupt seed, as women are. But the Peritonaeum does not hinder the evaporations of the seed, because the Veins do inwardly open upwards. Also Viragoes or mannish women, are not troubled with the said vapors. The reason must therefore be sought in the quality of the seed, which being in men and manly women more benigne, does neither go to, nor infect the Heart.
After the Constitution of the seminary Bladders these deferent Vessels are united into one smal passage which goes into the Prostatae.
Now the Prostatae, as if you would say the Waiters, are two Kernels, manifesty differing from the seed bladders, in use, form, situation, and magni∣tude, though Hofman think otherwise; their
Situation is at the Root of the Yard, above the Sphin∣cter or Muscle of the Bladder, on each side, at the neck thereof. Columbus calls them Prostatae, Vesalius glan∣dulosum corpus, Fallopius glandulosion assistens, others call them the little stones, to difference them from the true stones. Before and behind they are flat, on the sides round.
They are commonly as big as a Walnut.
Their Substance is spongy, and yet harder and whiter then that of other Kernels, and they are covered with a thicker Membrane; all which is to hinder the ovlie substance, of it self apt to run, from passing out. And because they are of exquisite sense, therefore they cause pleasure in Copulation. These Kernels are open by certain Pores into the Urethra or Piss-pipe, which is evidently apparent in such as have died of the Gonor∣rhaea, of which Gonorrhaea these Pores being dilated are many times the seat.
Their Use is to contain an oylie, slippery, and sat Humor, which is pressed forth when need requires, to daub the Urinary passage, to defend it from the acri∣mony of the seed or urin, and that it may not fall in through driness, but may remain slippery; because through it in Copulation, the said Humor does sud∣denly flow out of the seed.
This is that which Galen ment, when he said that they contained a certain Humor like seed, but much thinner, the use of which Humor, is to excite Lust,