Descending Colon Study Documents - Edubirdie

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

2024
Views:

388

Pages:

2
Author:

Mariam A. A.

Descending Colon • Position and other important information - • Blood Supply - • left colic and sigmoid veins Lymphatic drainage - • Left colic and superior sigmoid artery Marginal and vasa recta present throughout ascending, transverse and descending Venous drainage - • secondarily retroperitoneal position between the left colic flexure and the left iliac fossa, where it is continuous with the sigmoid colon ✓ peritoneum covers the colon anteriorly and laterally and binds to the posterior abdominal wall As it descends, the colon passes anterior to the lateral border of the left kidney As with the ascending colon, the descending colon has a paracolic gutter (the left one) on its lateral aspect inferior mesenteric Innervation - Sympathetic: splanchnic nerves; inferior mesenteric plexus Parasympathetic: vagus nerve Haustra • The segmented bulges created along the surface of the colon by the taenia coli Peritoneal attachment of ascending, transverse, and descending • • Transverse mesocolon Greater omentum Appendices epiploic • Protrusions of fat (off the colon) lined by peritoneum Right (hepatic) and left (splenic) colic flexures • The left colic flexure (splenic flexure) is usually more superior, more acute, and less mobile than the right colic flexure. ✓ It lies anterior to the inferior part of the left kidney and attaches to the diaphragm through the phrenicocolic ligament

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