tie The Stomach. [Book DC. 



when the ftomach is diftended its body rifes nearly to 

 a level with its orifices. The body of the ftomach is 

 d'ftinguifhed into two curvatures j the concave furface, 

 which is applied round the fpine, is called the leffer 

 curvature, and that which is convex, and is turned for- 

 wards and downwards, the greater. 



The ftomach is formed of four coats. The external 

 of theie is the peritoneal ; the fecond is mufcular, and 

 is formed of fibres, which are continued from the muf- 

 cular coat of the cefophagus. Thefe fibres are va- 

 rioufly diftributed in the ftamach. Some run directly 

 in the leffer curvature to the right orifice of the fto- 

 mach, and are loft in the duodenum ; fome run down 

 each fide of the ftomach, and are loft in its wideft part 

 towards the left fide. Befides thefe longitudinal fibres, 

 the ftomach is furrounded by fome which are circular, 

 and which are alfo continued from the eefophagus. 

 There is a large afiemblage of mufcular fibres round 

 the right orifice of the ftomach, which conftringes it 

 fo as to prevent the food from.pafling into the in- 

 teftines before it has undergone the proper changes in 

 the ftomach. 



Jf we examine the inner furface of the fmall extre- 

 mity of the ftomach, where it ends in the inteftinal ca- 

 nal, we obferve a circular border with a roundifh hole 

 in the middle, which ft the pylorus, as before mentioned. 

 The .border is formed, partly by a fold of the internal 

 coats of the ftomach,, and partly by a collection of 

 flefhy fibres fixed in the duplicature of the tunica cel- 

 lulofa, and diftinguifhed from the other mufcular fibres 

 by a thin whitifh circle, which appears even through 

 the external coat, round the union of the ftomach and 

 inteftines. 



The third cq^tof the ftomach, which conftitutes the 

 gr.eate.ft part of its lubftance, is .the cellular, or a as it 



has. 



