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The small intestine extends from the pylorus of the stomach to the ileocecal fold and consists of the duodenum, jejunum, and ileum. The duodenum is mostly a retroperitoneal organ. The jejunum begins in the left upper quadrant and terminates as the ileum in the right lower quadrant. The jejunum and ileum receive their arterial blood supply from the superior mesenteric artery. Venous drainage is by the superior mesenteric vein.

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Anatomy-Small Intestine

  • 章节

  • 发表日期：

    2025年

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  • Carolyn L. Power,
  • Jennifer M. McBride,
  • Richard L. Drake,
  • James S. Wu

摘要

The small intestine extends from the pylorus of the stomach to the ileocecal fold and consists of the duodenum, jejunum, and ileum. The duodenum is mostly a retroperitoneal organ. The jejunum begins in the left upper quadrant and terminates as the ileum in the right lower quadrant. The jejunum and ileum receive their arterial blood supply from the superior mesenteric artery. Venous drainage is by the superior mesenteric vein.