. The anatomy of the domestic animals . Veterinary anatomy. THE GREAT COLON 425 It IS somewhat difficult to get a correct idea of the cjEcal orifices. The caecum is sharply cuijed here and a large fold projects into its interior, somewhat Uke a shelf, and separates the two orifaces. The ileo-oa;cal orifice faces chiefly dorsally, while the csco-coHc orifice faces forward into the caBcum. The Great Colon The great colon (Colon crassum) begins at the caeco-colic orifice, and terminates by joining the small colon behind the saccus caecus of the stomach. It is ten to twelve feet (ca. 3 to m.)
. The anatomy of the domestic animals . Veterinary anatomy. THE GREAT COLON 425 It IS somewhat difficult to get a correct idea of the cjEcal orifices. The caecum is sharply cuijed here and a large fold projects into its interior, somewhat Uke a shelf, and separates the two orifaces. The ileo-oa;cal orifice faces chiefly dorsally, while the csco-coHc orifice faces forward into the caBcum. The Great Colon The great colon (Colon crassum) begins at the caeco-colic orifice, and terminates by joining the small colon behind the saccus caecus of the stomach. It is ten to twelve feet (ca. 3 to m.) long, and its average diameter (exclusive of its narrowest part) is about eight to ten inches (ca. 20 to 25 cm.). Its capacity is more than double that of the cajcum. When removed from the abdomen, it consists of two parallel parts, which are connected by peritoneum and partially by areolax and muscular tissue also. In situ it is folded so that it consists of four parts, which are designated according to their position or numerically. The three bent connecting parts are termed the flexures. The first part, the right ventral colon (Colon ventrale dextrum), begins at the lesser curvature of the base of the ciEcum, about opposite the ventral part of the last rib or intercostal It forms an initial curve, the Origin of small colon Pelvic flexure. Diaphragmatic flexure -Sternal flexure IleuiTt Fig. 364.—Diagram op C^cum and Large Colon of Horse. convexity of which is directed upward and backward; this part is in contact with the upper part of the right flank. It then passes downward and forward along the right costal arch and then along the floor of the abdomen.^ Over the xiphoid cartilage it bends sharply to the left and backward, forming the sternal flexure (Flexura sternalis s. diaphragmatica ventralis). The second part, the left ventral colon (Colon ventrale sinistrum), passes backward on the abdominal floor, to the left of the first part and the caecum and, on reaching
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