Ascending Colon Study Materials - Edubirdie

University:
Western Sydney University
Course:
MEDI 2003 | Clinical Sciences 2
Academic year:

2024
Views:

383

Pages:

2
Author:

Mariam A. A.

Ascending Colon • Position and other important information - • Blood supply - • ileocolic and right colic veins Lymphatic Drainage - • ileocolic and right colic arteries Venous drainage - • Second part of the colon Passes superiorly in the right lobe of the liver, where it turns to the left at the right colic flexure This flexure lies deep to the 9th and 10th ribs and is overlapped by the inferior part of the liver. The ascending colon is usually covered by peritoneum anteriorly and on its sides In 25% of people, it has a short mesentery is separated from the anterolateral abdominal wall by the greater omentum A deep vertical groove lined with parietal peritoneum, the right paracolic gutter, lies between the lateral aspect of the ascending colon and the adjacent abdominal wall epicolic and paracolic lymph nodes -> ileocolic and intermediate right colic lymph nodes -> superior mesenteric lymph nodes Innervation - Sympathetic: superior and inferior mesenteric plexuses Parasympathetic: Vagus Transverse Colon Position and other important information - - Third, longest and most mobile part of the colon ✓ Since it is most mobile it is variable in position ➢ Usually hanging to the level of the umbilicus (L3) ➢ In tall thin people may be extended to the pelvis It crosses the abdomen from the right colic flexure to the left colic flexure, where it turns inferiorly to become the descending colon ✓ Note: the transverse mesocolon is fused with the posterior wall the omental bursa ➢ The root of the transverse mesocolon lies along the inferior border to the pancreas and is continuous with the parietal peritoneum posteriorly Blood Supply • - middle colic and left colic arteries Venous Drainage • • - left colic and superior sigmoid arteries Lymphatic Drainage - middle colic lymph nodes -> superior mesenteric lymph nodes Innervation - Sympathetic: splanchnic nerves; superior and inferior mesenteric plexuses - Parasympathetic: Vagus nerve

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