The Liver, being the thickest of all the Bowels, is plac'd in the Right _Hypochondrium_, at the distance only of a Fingers breadth from the Diaphragm; its Figure much resembling that of a thick piece of Beef: It is Convex on the outside, and Concave within; its Substance is soft and tender, its Colour and Consistence being like coagulated Blood: It is cleft at bottom, and divided into two Lobes, _viz._ one greater, and the other less: Its Office is to purifie the Mass of Blood by Filtration; and it is bound by two strong Ligaments, the first whereof adheres to the Diaphragm, and the second to the _Xiphoides_ or Sword-like Cartilage. Two great Veins take their Rise from hence, _viz._ the _Vena Portæ_, and the _Vena Cava_, which form innumerable Branches, as it were Roots in the Body of the Liver. The Gall-Bladder is fasten'd to the hollow part thereof, and dischargeth its Choler into the Gut _Duodenum_, thro' the Vessels that bear the Name of _Meatus Choledochi_, or _Ductus Biliares._ This Choler is not a meer Excrement, but on the contrary of singular Use in causing the Fermentation of the Chyle, and bringing it to perfection. {73} _What is the Spleen?_ The Spleen is a Bowel resembling a Hart's Tongue in shape, and situated in the Left _Hypochondrium_, over-against the Liver: Its length is about half a Foot, and its breadth equal to that of three Fingers; its Substance being soft, as that of the Liver, and its Colour like dark coagulated Blood: It is fasten'd to the _Peritonæum_, Left Kidney, Diaphragm, and to the Caul on the inside; as also to the Stomach by certain Veins, call'd _Vasa Brevia_; nevertheless these Ligatures do not hinder it from wandering here and there in the lower Belly, where it often changeth its place, and causeth many dreadful symptoms by its irregular Motions. Its Office is to Subtilize the Blood by cleansing and refining it. _What are the Reins?_ The Reins or Kidneys are Parts of a Fleshy Consistence, harder and more firm than that of the Liver and Spleen: They are both situated in the sides of the Umbilical Region, upon the Muscle _Psoas_, between the two Tunicks of the _Peritonæum_; but the Right is lower than the Left: Their Shape resembleth that of a _French_ Bean, and they receive Nerves from the Stomach, whence Vomitings are frequently occasion'd in the Nephritical Colicks: They are fasten'd to the Midriff, Loins, and _Aorta_, by the _Emulgent_ Arteries; as also to the Bladder by the _Ureters_. The Right Kidney likewise adheres to the Gut _Cæcum_, and the Left to the _Colon_. Their Office is to filtrate or strain the Urine in the _Pelves_ or Basons, which they have in the middle of their Body on the inside, and {74} to cause it to run thro' the Vessels call'd _Ureters_ into the Bladder.