. Anatomy of the woodchuck (Marmota monax). Woodchuck; Mammals. 90 Anatomy of the Woodenuck, Marmota monax. Fig. 5-8. Isolated intestinal track. 1 second loop of ascending colon, 2 transverse colon, 3 descending colon, 4 rectum, 5 jejunum, 6 ileum, 7 apex of the cecum, 8 body of the cecum, 9 base of the cecum, 10 ascending colon, 11 duodenum, 12 first loop of the ascending colon. teries (Fig. 5-5) along its greater curvature. The left gastric artery is a branch of the celiac artery. The right gastric and right gastroepiploic arteries are branches of the hepatic artery and the left gastroe- pip
. Anatomy of the woodchuck (Marmota monax). Woodchuck; Mammals. 90 Anatomy of the Woodenuck, Marmota monax. Fig. 5-8. Isolated intestinal track. 1 second loop of ascending colon, 2 transverse colon, 3 descending colon, 4 rectum, 5 jejunum, 6 ileum, 7 apex of the cecum, 8 body of the cecum, 9 base of the cecum, 10 ascending colon, 11 duodenum, 12 first loop of the ascending colon. teries (Fig. 5-5) along its greater curvature. The left gastric artery is a branch of the celiac artery. The right gastric and right gastroepiploic arteries are branches of the hepatic artery and the left gastroe- piploic artery is a branch of the splenic artery. The gastroesophageal artery arises from the terminal part of the hepatic artery and supplies the abdom- inal esophagus and cardia of the stomach. The veins of the stomach parallel the arteries. They drain into the portal vein (see chapter 9 for the detail of the portal vein). The gastroduodenal vein also drains into the left branch of the portal vein. Innervation: The stomach is supplied by the va- gus nerve and receives sympathetic fibers from the celiac plexus. The ventral vagal trunk supplies the lesser curvature, pylorus and visceral surface of the stomach. The dorsal vagal trunk supplies the great- er curvature and parietal surface of the stomach. Lymph drainage: Lymph is drained mainly by the gastric lymph node, situated in the lesser omentum. Garon and Pierard (1972) made a gross compar- ison of the stomach of Marmota monax with that of the muskrat, Ondatra zibethicus, and present a table of weights and capacities for each species. Whereas the digestive glands of the muskrat were concentrated in a well-circumscribed area of the body of the stomach, the same was not true of the woodchuck. The small intestine, intestinum tenue, extends from the pylorus of the stomach to the ileocolic orifice leading into the large intestine. In adult an- imals it is 200 to 250 cm long. The small intestine consists of the relatively fixed and s
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