. The comparative anatomy of the domesticated animals. Veterinary anatomy. 482 THE DIGESTIVE APPARATUS IN MAMMALIA it rests on the xiphoid cartilage of the sternum (Fig. 282, g). Here begins the second portion of the viscus, which is in immediate contact with the inferior abdominal wall, and extends backwards into the pelvic cavity, where it is inflected to the left to constitute the sigmoid or pelvic flexure. This curvature— the centre of the colic loop—is in relation with the rectum and bladder, as well as with the deferent canals, or the uterus and ovaries, according to the sex. It is succe
. The comparative anatomy of the domesticated animals. Veterinary anatomy. 482 THE DIGESTIVE APPARATUS IN MAMMALIA it rests on the xiphoid cartilage of the sternum (Fig. 282, g). Here begins the second portion of the viscus, which is in immediate contact with the inferior abdominal wall, and extends backwards into the pelvic cavity, where it is inflected to the left to constitute the sigmoid or pelvic flexure. This curvature— the centre of the colic loop—is in relation with the rectum and bladder, as well as with the deferent canals, or the uterus and ovaries, according to the sex. It is succeeded bj the third portion of the colon, which is carried forward, above, and to the left of the preceding. Bound to the second division by peritoneum and con- nective tissue, this new section reaches the tendinous centre of the diaphragm, and is then doubled upwards and to the right. The flexure arising from this third duplicature is called the diaphragmatic, because of its relations with the musculo- aponeurotic membrane that partitions the great cavity of the trunk, or the gastro- kepatic curvature, in consequence of its lying equally Fig. 285. against the liver and stomach (it is also designated the sigmoid flexure) (Fig. 282, k). To this flexure succeeds the fourth and last portion of the large colon, bound to the first portion, as the second is to the third. This extends, posteriorly, to the base of the caecum, where it terminates in a sudden contraction, and is continued by the small colon ; it occupies the sublumbar region, and, through the medium of connective tissue, is applied against the inferior face of the pancreas and the inner PLAN OF THE COLON. sidc 01 thc c^cal arcn. Mode of attachment.—The large colon can be easily displaced in the abdominal cavity. It is nevertheless fixed : 1. By its origin, to the cfficum and to the serous frsenum which attaches it to that receptacle. 2. By the adherence of its terminal portion to the pancreas and arch of the caecum.
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