The midgut projects into which anatomical structure?

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Prepare for the Alimentary and Digestive System Test. Utilize flashcards and multiple-choice questions, with hints and explanations for each question. Ace your exam with confidence!

Multiple Choice

The midgut projects into which anatomical structure?

Explanation:
During early development the midgut grows quickly and cannot fit inside the enlarging abdominal cavity, so it temporarily herniates into the umbilical cord (physiologic herniation) around weeks 6–8. While in the cord, it rotates around the axis of the superior mesenteric artery and then returns to the abdomen by weeks 10–12, completing about 270 degrees of rotation. This makes the umbilical cord the structure into which the midgut projects. The other structures listed—diaphragm, thoracic cavity, or liver—are not sites of this normal midgut herniation.

During early development the midgut grows quickly and cannot fit inside the enlarging abdominal cavity, so it temporarily herniates into the umbilical cord (physiologic herniation) around weeks 6–8. While in the cord, it rotates around the axis of the superior mesenteric artery and then returns to the abdomen by weeks 10–12, completing about 270 degrees of rotation. This makes the umbilical cord the structure into which the midgut projects. The other structures listed—diaphragm, thoracic cavity, or liver—are not sites of this normal midgut herniation.

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