Which region gives rise to the majority of the large intestine?

Which region gives rise to the majority of the large intestine?

• A. Foregut
• B. Midgut
• C. Hindgut
• D. Cloaca

Answer: (B)

Think of the primitive gut tube as three regions: foregut, midgut, and hindgut. The large intestine is formed from portions of both the midgut and hindgut. The midgut gives rise to the cecum, ascending colon, and the proximal two‑thirds of the transverse colon. The hindgut forms the distal one‑third of the transverse colon, plus the descending and sigmoid colon and the rectum. Since the midgut contributes the majority of the colon, it supplies most of the large intestine. The cloaca is an early structure that later partitions to form parts of the anorectal region, but it isn’t the primary source for the large intestine.

Think of the primitive gut tube as three regions: foregut, midgut, and hindgut. The large intestine is formed from portions of both the midgut and hindgut. The midgut gives rise to the cecum, ascending colon, and the proximal two‑thirds of the transverse colon. The hindgut forms the distal one‑third of the transverse colon, plus the descending and sigmoid colon and the rectum. Since the midgut contributes the majority of the colon, it supplies most of the large intestine. The cloaca is an early structure that later partitions to form parts of the anorectal region, but it isn’t the primary source for the large intestine.