. Anatomy of the woodchuck (Marmota monax). Woodchuck; Mammals. 92 Anatomy of the Woodchuck, Marmota monax. Fig. 5-9. Abdomen, superficial ventral view. 1 major omentum, 2 second loop of the ascending colon, 3 apex of the cecum, 4 body of the cecum, 5 base of the cecum, 6 descending colon, 7 urinary bladder, 8 urethra, 9 round lig. of uterus, 10 uterus, 11 first loop of the ascending colon, 12 jejunum, 13 left lateral liver lobe, 14 xiphoid cartilage of sternum. lies along the right dorsolateral abdominal wall. It can extend caudally as far as the pelvic inlet. The terminal end of its ascendin
. Anatomy of the woodchuck (Marmota monax). Woodchuck; Mammals. 92 Anatomy of the Woodchuck, Marmota monax. Fig. 5-9. Abdomen, superficial ventral view. 1 major omentum, 2 second loop of the ascending colon, 3 apex of the cecum, 4 body of the cecum, 5 base of the cecum, 6 descending colon, 7 urinary bladder, 8 urethra, 9 round lig. of uterus, 10 uterus, 11 first loop of the ascending colon, 12 jejunum, 13 left lateral liver lobe, 14 xiphoid cartilage of sternum. lies along the right dorsolateral abdominal wall. It can extend caudally as far as the pelvic inlet. The terminal end of its ascending limb turns to the left, caudal to the liver, to form the second loop. The second loop lies transversely across the ab- dominal floor caudal to the stomach and liver. It extends to the left paralumbar fossa and is com- monly separated from the stomach by the greater omentum. The terminal end of the second loop continues as the transverse colon. The transverse colon, colon transversum (Figs. 5- 8 and 5-10), is short and passes transversely, cranial to the cranial mesenteric artery. It turns caudally to continue as the descending colon. The descending colon, colon descendens (Figs. 5- 8 and 5-10), is about 35 cm long and thinner than the other parts of the colon. Its mesocolon is long, resulting in considerable coiling of the terminal part of the large intestine. The descending colon passes caudally, to the left of the midline and me- dial to the left kidney. It enters the pelvic cavity and continues as the rectum. Blood supply: The ascending, transverse and ini- tial part of the descending colon is supplied by branches of the cranial mesenteric artery. The cau- dal mesenteric artery supplies the rest of the de- scending colon. The veins parallel the arteries and drain into the portal vein. Lymph drainage: Lymph is drained by the colic lymph nodes situated in the mesocolon. Innervation: The vagal nerves supply the initial part of the large intestine, while the pelvic nerves supp
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