COMLEX USA Comprehensive Osteopathic Medical Licensing Examination Practice 2026 - Free COMLEX Practice Questions and Study Guide

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What vertebral level is associated with the ascending and transverse colon?

T10-T12

The correct answer is T10-T12 when considering the vertebral level associated with the ascending and transverse colon. The ascending colon primarily develops from the midgut, which receives its blood supply from the superior mesenteric artery. The relevant sympathetic innervation also occurs at the thoracic levels, particularly T10 to T12.

The transverse colon is unique as it receives contributions from both the midgut and hindgut, but its proximal portion is still innervated through the T10 to T12 region. Knowledge of embryological development helps in understanding the neuroanatomical connections and associated vertebral segments.

The other options either encompass vertebral segments that do not correlate as effectively with the innervation and vascular supply of the ascending and transverse colon or provide a narrower range of vertebral levels that do not include the main segments involved in the colon's development and innervation.

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T12

L1-L2

T8-T10

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