MUSCULAR LAYERS OF THE STOilACH. 



351 



cially the lesser one. On the anterior and posterior surfaces they are 

 very thinly scattered, or scarcely to be found, but towards the pylorus 



Fig. 2i6. 



Fig. 246.— Sketch 

 OF THE Distri- 

 bution OF Mus- 

 cular Fibres in 

 THE Stomach 

 (Allen Thomson). 

 One-Third the 

 Natural Size. 



A, external laj-er 

 of longitudinal fi- 

 bres, as seen from 

 the outside ; B, 

 middle layer of cir- 

 cular fibres as seen 

 on i-emoving the 

 longitudinal layer ; 

 C, oblique fibres ex- 

 posed by removing 

 some of the fibres of 

 the circular layer, the 

 cut edges of which 

 are seen below the 

 lesser curvature ; c, 

 the cardiac end ; p, 

 the pyloric end ; in 

 A, the stronger longi- 

 tudinal fibres passing 

 along the lesser and 

 greater curvatures, 

 and all round the 

 pyloric end, are 

 shown, and the radi- 

 ating fibres spreading 

 from the end of the 

 gullet over the front 

 (and back) of the 

 stomach ; in B, the 

 nearly uniform layer 

 of circular fibres, in 

 two sets crossing each 

 other very obliquely 

 at 0, and at the car- 

 diac end becoming 

 concentric to the 

 centre of the great 

 cul-de-sac ; in C, the 

 oblique fibres, oi, oV, 

 which form a con- 

 tinuation of the cir- 

 cular fibres of the 

 gullet (a) and spread 

 from the left side of 

 the cardia, gradually 

 merging into the 

 deeper circular fibres 

 with which, towards 

 c(E, they entirely 

 blend. 



cce 



jyc 



are well marked and form a thick uniform layer, which, passing over 



