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A MANUAL OF VETERINARY PHYSIOLOGY 



towards its starting point. Running on top of the previously 

 described portion it descends towards the diaphragm, growing 

 gradually larger in calibre, and then ascends towards the loin, 

 being here of immense volume — in fact, at its largest diameter ; it 

 then suddenly contracts, and forms the single colon (see Figs. 76 



Fig. 



76. — The Double Colon looked at from Above 

 Muller). 



MODIFIED FROxM 



1, The first colon, the caecum being removed ; 2, the pelvic flexure, the bowel 

 being narrow ; 3, the colon suddenly enlarges ; 4, its diaphragmatic flexure ; 

 5, the single colon. Several of the bands are seen ; note also the sacculated 

 and non-sacculated portions of the bowels. 



and 77). The object of the difference in the volume of the double 

 colon appears to be for the convenience of its accommodation 

 in the abdominal cavity. 



The double colon may, for the purpose of description, be divided 

 into four portions : the ingesta in the first and third descend, in 

 the second and fourth ascend. It is found that the physical 

 characters of the contents are not the same throughout. In the 



