CN X innervates the upper portion of the gut by which fraction?

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Multiple Choice

CN X innervates the upper portion of the gut by which fraction?

Explanation:
The vagus nerve provides parasympathetic innervation to the foregut and midgut, which together make up the upper two-thirds of the gut tube. The hindgut, down to the end of the rectum, is supplied by pelvic splanchnic nerves (S2–S4). A useful anatomical boundary is the distal two-thirds of the transverse colon, where the vagus stops and pelvic supply begins. So CN X innervates the upper two-thirds of the gut.

The vagus nerve provides parasympathetic innervation to the foregut and midgut, which together make up the upper two-thirds of the gut tube. The hindgut, down to the end of the rectum, is supplied by pelvic splanchnic nerves (S2–S4). A useful anatomical boundary is the distal two-thirds of the transverse colon, where the vagus stops and pelvic supply begins. So CN X innervates the upper two-thirds of the gut.

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