A complete system of farriery, and veterinary medicine : containing a compendium of the veterinary art ... the anatomy and physiology of the foot, and the principles and practice of shoeing : with observations on stable management ... / by James White ... ; newly arranged by the publishers, in which are introduced ... treatises upon the glanders, farcy, staggers ... by the same author.

  • White, James, -1825
Date:
1818
Catalogue details

Licence: Public Domain Mark

Credit: A complete system of farriery, and veterinary medicine : containing a compendium of the veterinary art ... the anatomy and physiology of the foot, and the principles and practice of shoeing : with observations on stable management ... / by James White ... ; newly arranged by the publishers, in which are introduced ... treatises upon the glanders, farcy, staggers ... by the same author. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

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    The pancreas is also a glandular body, and secretes, a fluid somewhat resembling saliva which is convey- ed by the pancreatic duct into the duodenum, at the .same place where the hepatic duct enters. When these fluids (the bile and pancreatic juice) are poured into the intestine, they mingle with the mass of digests ed food which has been expelled from the stomach, and separate from it all those essentia] parts which are fit to be converted into blood : this process is termed chyiification. We have before observed, when des- cribing the mesentery1, or that membrane by \\ intestines are held together, Lha? an Immense no. of small delicate vessels are spread over its surface, named lacteals, from their CGiitaing a fluid which in its appearance resembles milk. This fluid consists in fact of the essential parts of tire food proceeding to the heart, in order to be converted into blood. All the lacteals open into the intestines, and cover the whole of their internal surface, where they are always dis- posed to absorb the nutritious parts of the food in its passage through the intestinal canal. Some vA ologists suppose, that the mouths of the lacteals have the power of selecting such parts of the food as are fit to be converted into blood, that no previous separation takes place, and that the bile serves only as a natural purgative, constantly stimulating the intes by keeping up a small degree of motion in them, promoting the expulsion of the feculent p.irts of the food. It wil probably be asked, how it is that the mass of food passes through the intestines, since they are so convoluted that it cannot possibly be effected by the power of gravity ? but if we examine their struct- ure, this phenomenon may be readily explained. The intestines are composed, in great measure, of muscu- lar fibres, some of which run in a circular, and others in a longitudinal direction : when the circular v' contract, the diameter of the canal is diminished ; when the, longitudinal fibres are in action, it bee