Small Intestine — Morphology and Relations

The jejunum differs from the ileum in several morphological features. Which of the following is characteristic of the jejunum?

The duodenojejunal flexure is an important anatomical landmark. Which structure is responsible for suspending and anchoring the duodenojejunal flexure to the posterior abdominal wall?

A 52-year-old man from rural Maharashtra presents with a 3-month history of progressive abdominal distension, postprandial fullness, and intermittent colicky pain. On examination, visible peristaltic waves are noted moving from left to right across the abdomen. Abdominal imaging reveals dilated small bowel loops with a transition point in the lower abdomen. During exploratory laparotomy, the surgeon identifies adhesions tethering multiple loops of jejunum and ileum to the anterior abdominal wall and parietal peritoneum. The small bowel is found to be arranged in a characteristic pattern with multiple U-shaped loops. Which anatomical relationship of the small intestine is most relevant to understanding the pathophysiology of obstruction in this patient?