Small Intestine Length After Death: Myth vs. Fact

The small intestine does not change length at death. In adults, it measures approximately 20–25 feet (6–7.5 meters) in vivo and postmortem. The misconception may arise from postmortem relaxation of smooth muscle tone or measurement differences (in vivo via intubation/surgery vs. postmortem dissection).

Anatomy Recap

• Duodenum: ~10 inches (25 cm)
• Jejunum: ~8 ft (2.5 m)
• Ileum: ~12 ft (3.5 m)

Length varies with age, body habitus, and measurement method, but death itself does not alter it.