THORAX AND ABDOMEN OF THE HORSE 113 



bent upon itself .so that the entrance and the exit are within a short 

 distance of each other. 



The stomach is placed in the dorsal part of the abdomen caudal to 

 the diaphragm and liver, all except a small part of the right extremity 

 being to the left of the median plane of the body. The most dorsal 

 part of the organ, the saccus csecus, lies under cover of the fifteenth to 

 seventeenth ribs on the left side of the body, and in contact with the left 

 dorsal part of the diaphragm. During expiration the stomach, when 

 moderately distended, occupies a position opposite the thoracic vertebrae 



Greater curvature. 



Saccus csecus. 



Line of reflection of 

 peritoneum. 



I CHI' A ... 



iwVr^- gastrica sinistra 



(ramus caudalis). 

 Pancreatic duct. 



Duodenum. 

 ^, Pylorus. 



Fig. 52. — Caudal surface of the stomach. 



from the thirteenth to the seventeenth. Inspiration pushes it back- 

 wards (towards the pelvis), a distance about equal to the length of one 

 vertebra. 



Not infrequently a shallow constriction divides the exterior of the 

 organ into an oesophageal part (pars oesophagea), to the left and dorsal 

 in position, and a larger ventral intestinal part (pars intestinalis). 

 This external distinction is of some moment, inasmuch as it corresponds 

 to a difference in the structure and function of the mucous lining of the 

 interior. 



That part of the stomach which is connected with the ossophagus is 

 known as the cardial dorsal to and to the left of which is the blind sac 



1 Kapoia (cardia) [Gr.], the heart. The oesophageal opening into the stomach is 

 close to the heart in the human subject. 

 8 



