In which order does food pass through the small intestine

Question

BlackTom AI · Accepted Answer

To tackle the question, I’ll evaluate what each option says about the flow of digestive contents from the stomach into the small intestine.
Option 1: 'Pyloric sphincter, Duodenum, Jejunum, Ileum' — this matches the well-established anatomical sequence: chyme passes through the pyloric sphincter from the stomach into the duodenum first, then travels through the jejunum, and finally progresses to the ileum. This reflects the typical order of sections in the small intestine.
Option 2: 'Pyloric sphincter, Jejunum, Duodenum, Ileum' — this proposes the jejunum comes before the duodenum, which contradicts anatomy, since chyme enters the duodenum before reaching the jejunum.
Option 3: 'Cardiac sphincter, Duodenum, Jejunum, Ileum' — the cardiac sphincter is the esophageal sphincter, not involved in the small-intestine sequence. Including it here misidentifies the entry point of the small intestine, making this option inaccurate.
Option 4: 'Pyloric sphincter, Jejunum, Duodenum, Traverse colon' — after the pyloric sphincter, the correct next section is the duodenum, not the jejunum; and the traverse colon is part of the large intestine, not the small intestine, so this option mixes incorrect order and anatomy.
In summary, the reasoning shows that the only option aligning with the established progression through the stomach and the three consecutive parts of the small intestine is the one that lists pyloric sphincter first, followed by the duodenum, then the jejunum, and finally the ileum. The other options violate anatomical order or misidentify structures, leading to inaccuracies.

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