Human physiology / by William Furneaux.

  • William Samuel Furneaux
Date:
1909
Catalogue details

Licence: In copyright

Credit: Human physiology / by William Furneaux. Source: Wellcome Collection.

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    those of the oesophagus, and are, in fact, continuations of them. The outer of these, which, of course, lies next the peritoneal coat, is muscular; the next is composed of areolar tis- sue, and the inner coat is a mucous membrane. 'I'he muscular coat of the stomach consists of three sets of involuntary muscular fibres. The outer set run longitudinally from the cardiac orifice to the pylorus, and are continuous with the longitudinal fibres of the oesophagus. The middle set of fibres encircle all parts of the stomach, and are especially numer- Fig. 96.—A Section through the Walls pyloric end. of the Stomach. Magnified 15 dia- The inner set consist of meters. oblique fibres. They are I, surface of the mucous membrane, showing the COntinUOUS with the cirCU- openings of the peptic glands ; 2, mucous mem- i r>f rpcnnlno-iic brane, composed almost entirely of glands ; 3, sub- II OrCS OI lUe OcSOpnagUS, mucous or areolar tissue ; 4, transverse muscular and exist chiefly at the Car- fibres ; 5, longitudinal muscular fibres : 6, peri- • j c . 1 , 1 toneal coat. diac end of the Stomach. By means of these mus- cles the contents of the stomach are kept in a continuous circular motion, passing from the cardiac end to the pylorus along the greater curvature, and back to the cardiac end along the lesser curvature : and, as with the oesophagus, these motions are best maintain- ed when the stomach is moderately distended wflth food - substances, so that the muscles can grasp them on all sides. The walls of the sto mach are capable of great distension ; consequently it can adapt itself to the quantity of food it contains, and, at the same time, be always in contact with the food so as to Fig. 97.—Muscular Coat of the Stomach. External layer of longitudinal fibres, p, pylorus ; c, cardiac end ; ce, oesophagus. act on it.
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