44 UNIVERSITY OF MISSOURI STUDIES 



inward anterior to the right half of the fifth vertebra. It 

 lies internal to the caecum and is connected to the intestine 

 by a short mesoappendix. The appendix is about 9 cm. 

 in length, .5 cm. in diameter, and with a lumen about .2 cm. 

 in diameter. When seen from the front the first 7 cm. of 

 the appendix form an irregular W-shaped figure, with the 

 last 2 cm. lying between the W and the vertebral column 

 (Plates XXVIII and XXXII). The caecum is almost en- 

 tirely covered with peritonaeum, the upper part being 

 slightly adherent to the psoas muscle posteriorly (Plate 

 XXI). It lies in the lateral angle of the body cavity be- 

 tween the iliopsoas and transversus abdominus muscles. 

 Internal to it are coils of the jejunoileum, and the appendix. 



The ascending colon is considerably distended in its 

 lower three-fourths, and fills a large part of the right lumbar 

 region of the abdominal cavity. It ascends nearly vertically 

 upward from the caecum to the inferior surface of the liver. 

 It is covered with peritonaeum in front and on the two sides 

 except where it comes into contact internally, near the 

 hepatic flexure, with the duodenum (Plate XVIII). The 

 lower half is in relation internally with the jejunoileum, 

 anteriorly and externally with the body wall. Posteriorly 

 it is attached to the quadratus and psoas muscles. The 

 upper half is adherent internally to the second portion of 

 the duodenum and posteriorly to the lower half of the kid- 

 ney. Externally it is in contact with the liver and anteriorly 

 with the beginning of the transverse colon. The ureter runs 

 downward internal to the colon but does not enter into 

 close relation with it as Plates XXVIII and XXXII might 

 lead one to believe. 



The hepatic flexure is at the level of the second lumbar 

 vertebra about 7 cm. to the right of the midplane and 4 cm. 

 in front of the midaxillary plane. Upon the anterior wall 



