ABDOMINAL CAVITY 



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three districts or zones, which are termed, from above down- 

 wards (i) the costal, (2) the umbilical, and (3) the hypo- 

 gastric zone. 



The two vertical planes of subdivision are called the right 

 and left lateral planes. Each corresponds, on the surface, to 

 a perpendicular line reared from the inguinal ligament at the 



Stomach 



Transpyloric 

 plane 



Subcostal plane 

 Umbilicus 



Intertubercular 

 plane 



Iliac colon 



t Left. lateral 

 plane 



FIG. 119. The Abdominal Viscera, as seen from the front, after removal of 

 the greater omentum. The dark lines indicate the subdivision of the 

 abdominal cavity. (Birmingham.) 



midpoint between the symphysis pubis and the anterior 

 superior spine of the ilium. 



By the lateral planes, each of the three zones determined 

 by the horizontal planes of section is subdivided into three 

 parts. 



The costal zone is mapped off into a central epigastric 

 region and a right and a left hypochondriac region ; the umbilical 



