GREAT COLON. 309 



threo Jlezuvea or c^.n^ls. Iq treeing its courcs, these four divisions 

 present themsshes tbus. Leaving the arch of the csecum in the 

 right lumbar region, it passes obliquely forwards to the posterior 

 surface of the diaphragm in the epigastric region, v/here it turns 

 round to the left, forming the first or sternal fiexure. Here the 

 second division originates, and in contact with the inferior ab- 



Fia. 103. 



Caecum and Great Colon of a Ilor;3. a,5C3ecum ; h, c, Its muscular bands ; d. Termination of the' 

 ilcura ; e. First, e', Second, /, Third, and /', Fourth division of colon ; g, Pelvic flexure ; ft, Origin 

 of Floating Colon. The arrows indicalcj the course of the food through the colon. 



<lominal walls, it runs backv/oxds to the hypogastric region, where 

 it io doubled upon itself, forming the second, sigmoid or pelvic 

 jiexure. From this flexure, the third portion passes forwards, 

 above and to the left of the second, to which it is attached by 

 cellukr tissue and peritoneum, reaches the diaphragm, and i* 

 inflected upwards to the right, forming the third or diaphrag- 

 matic fiexure, which is in relation with and below the liver and 



