It remains to take an Account of the Bowels _viz._ the Stomach, Mesentery, Liver, Spleen, Kidneys, Bladder, and Guts, together with the Parts appointed for Generation, which in Men {69} are the Spermatick Vessels, the Testicles, and the _Penis_; and in Women, the Spermatick Vessels, the Testicles or Ovaries, the _Matrix_, and its _Vagina_ or Neck. _What is the Stomach?_ It is the Receptacle of the Aliments or Food convey'd thither thro' the _Oesophagus_ or Gullet, which is a Canal, or kind of streight Gut that reacheth from the Throat to the Mouth of the Stomach. The Stomach it self is situated immediately under the _Diaphragm_ or Midriff, between the Liver and the Spleen, having two Orifices, whereof the Left is properly call'd _Stomachus_, or the Upper, and the Right (at its other Extremity) _Pylorus_, or the lower Orifice. Its Figure resembleth that of a Bag-Pipe, and the greater part of its Body lies toward the Left side. It is compos'd of three Membranes, _viz._ one Common, which it receives from the _Peritonæum_; and two Proper; the two uppermost being smooth, and the innermost altogether wrinkled. _What is the _Pancreas_ or Sweet-bread?_ It is a Fat Body, consisting of many Glandules wrapt up in the same Tunicle, being situated under the _Pylorus_ or lower Orifice of the Stomach: It helps Digestion, and hath divers other uses; but its principal Office is to separate the serous Particles of the Blood, to be convey'd afterward into the Gut _Duodenum_, by a Canal or Passage, nam'd the _Pancreatick_. This Juice serves to cause the Chyle to ferment with the Choler, in order to remove the grosser Particles from those that ought to enter into the Lacteal Vessels. _Into how many sorts are the Guts distinguish'd?_ {70} There are two sorts, _viz._ the thin and the thick. _How many thin or small Guts are there?_ Three; that is to say, the _Duodenum_, the _Jejunum_, and the _Ileon_. _How many thick Guts are there?_ Three likewise; _viz._ the _Coecum_, the _Colon_, and the _Rectum_. _Why are some of them call'd thin Guts, and others thick?_ Because the thin are smaller, being appointed only to transport the Chyle out of the Stomach into the Reserver; whereas the thick are more large and stronger, serving to carry forth the gross Excrements out of the Belly. _Are the six Guts of an equal length?_ No, the _Duodenum_, which is the first of the thin Guts, is only twelve Fingers breadth long. The _Jejunum_, being the second, so call'd because always empty, is five Foot long: The third is nam'd _Ileon_, by reason of its great Turnings which oblige it to pass to the _Os Ilion_, where it produceth a Rupture; it extends it self almost twenty Foot in length.