. Anatomy of the woodchuck (Marmota monax). Woodchuck; Mammals. / i 8 -^. i i r. / f v I Fig. 5-6. Stomach, longitudinal section. 1 duodenum, 2 esophagus, 3 fundus of the stomach, 4 cardiac part of the stomach, 5 body of the stomach, 6 ventricular groove, 7 pyloric antrum, 8 pyloric canal. 9 major duodenal papilla. the middle of the neck it lies lateral to the trachea. The cervical esophagus enters the thorax dorsal to the trachea. On the left side the left common ca- rotid artery, vagosympathetic trunk, internal jugu- lar vein and tracheal duct, lies in the angle between the esophagus and lon
. Anatomy of the woodchuck (Marmota monax). Woodchuck; Mammals. / i 8 -^. i i r. / f v I Fig. 5-6. Stomach, longitudinal section. 1 duodenum, 2 esophagus, 3 fundus of the stomach, 4 cardiac part of the stomach, 5 body of the stomach, 6 ventricular groove, 7 pyloric antrum, 8 pyloric canal. 9 major duodenal papilla. the middle of the neck it lies lateral to the trachea. The cervical esophagus enters the thorax dorsal to the trachea. On the left side the left common ca- rotid artery, vagosympathetic trunk, internal jugu- lar vein and tracheal duct, lies in the angle between the esophagus and longus capitis muscle. The thoracic part, pars thoracica, extends from the thoracic inlet to the esophageal hiatus of the diaphragm. It is about 9 cm long and lies in the mediastinum. Cranial to the heart it passes dorsal to the trachea and thymus and to the right of the aortic arch. Caudal to the heart the esophagus lies ventral to the descending thoracic aorta and is re- lated to the infracardiac bursa (see mediastinal pleura under the respiratory system). It passes through the esophageal hiatus. The abdominal part, pars abdominalis, is approximately 2 cm long along its ventral border and 1 cm long along its dorsal border. It is attached to the diaphragm along its dorsal border by the greater omentum and to the papillary lobe of the liver along its ventral border by the lesser omentum. Blood supply: Branches of the thyroid arteries supply the cervical part, the broncho-esophageal ar- tery supplies the thoracic part and the left gastric artery supplies the abdominal part. Innervation: The cervical part is innervated by fibers from the pharyngoesophageal and recurrent laryngeal branches of the vagal nerves, and the tho- racic part by the dorsal and ventral vagal trunks. The stomach, ventriculus (Figs. 5-5, 5-7, 5-10, 5- 11 and 5-14), lies transversly on the median plane. Its size and shape varies greatly, depending on the quantity of food it contains. When it is empty it measures
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Keywords: ., bookcollectionbiodiversity, booksponsorbiodi, booksubjectmammals
