On food and its digestion: being an introduction to dietetics . Bile.—Its Quantity : as influenced by the Gall-bladder.—Its Composition.— Its two-fold Destiny; Excretion. on Digestion.—Its Sources.—Influence of the Liver on Diges-tion.—Contrast of Portal and Hepatic Bloods.—Progress of Digestion inthe Small Intestine. The intestine begins at that external constriction whichcorresponds to the pylorus (p, Fig. 15), and marks theboundary between the stomach and the intestinal latter, at about five sixths of its length downwards, isdivided into two portions by a cha
On food and its digestion: being an introduction to dietetics . Bile.—Its Quantity : as influenced by the Gall-bladder.—Its Composition.— Its two-fold Destiny; Excretion. on Digestion.—Its Sources.—Influence of the Liver on Diges-tion.—Contrast of Portal and Hepatic Bloods.—Progress of Digestion inthe Small Intestine. The intestine begins at that external constriction whichcorresponds to the pylorus (p, Fig. 15), and marks theboundary between the stomach and the intestinal latter, at about five sixths of its length downwards, isdivided into two portions by a change of size, correspond-ing to the presence of a ccecum or blind appendage (cc)without, and of a valve within the tube. Of these portions,the upper, long and narrow, is called the small intestine :and the lower, short and wide, the large intestine. The small intestine, cylindrical when distended, has an SMALL INTESTINE. 133 average length of 20 feet, and a diameter of 1J its yielding texture allows it to be narrowed by exten- Fig. Stomach and intestinal canal of the adult human subject,c P, stomach; c, cardiac ; p, pyloric orifice; J i, small intestine ; J, jeju-num ; i, ileum ; c c to a, large intestine, viz.:—-c c, caecum; a c, ascendingcolon; t c, transverse colon; d c, descending colon; s f, sigmoid flexureor sigmoid colon; b, rectum; A, anus. sion, and shortened by dilatation. It occupies the cavityof the belly; its commencement, at the pylorus, being in. K 3 134 DIGESTION. the right hypochondrium; its end, at the caecum, in theright iliac fossa, to which the commencement of the largeintestine is attached. Part of this terminal portion oftenoccupies the pelvis ; but most of the intervening small in-testine is so free to move, that it may casually occupyalmost any part of the abdominal cavity. That upper end of the small intestine which is con-tinuous with the stomach may be distinguished from theremainder by certain differences of arrangemen
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Keywords: ., bookauthorbrintonw, bookcentury1800, bookdecade1860, bookyear1861
