Which structure is NOT a derivative of the midgut?

Which structure is NOT a derivative of the midgut?

• A. Small intestine
• B. Cecum
• C. Sigmoid colon
• D. Ascending colon

Answer: (C)

During embryonic development the gut tube is divided into three regions, each giving rise to specific parts of the adult digestive tract. The midgut stretches from the distal part of the duodenum to the proximal two‑thirds of the transverse colon, and its derivatives include the small intestine (jejunum and ileum), the cecum (with the appendix), the ascending colon, and the proximal two‑thirds of the transverse colon. The hindgut supplies the distal one‑third of the transverse colon, the descending colon, the sigmoid colon, the rectum, and part of the anal canal. So the structure that is not a midgut derivative is the sigmoid colon, since it comes from the hindgut.

During embryonic development the gut tube is divided into three regions, each giving rise to specific parts of the adult digestive tract. The midgut stretches from the distal part of the duodenum to the proximal two‑thirds of the transverse colon, and its derivatives include the small intestine (jejunum and ileum), the cecum (with the appendix), the ascending colon, and the proximal two‑thirds of the transverse colon. The hindgut supplies the distal one‑third of the transverse colon, the descending colon, the sigmoid colon, the rectum, and part of the anal canal. So the structure that is not a midgut derivative is the sigmoid colon, since it comes from the hindgut.