Which section of the small intestine is approximately 2.4 meters long and makes up around two-fifths of its total length?

Explanation

The jejunum is the middle portion of the small intestine, measuring about 2.4 meters in length and constituting roughly two-fifths of the small intestine. The duodenum is shorter and located at the beginning, the ileum follows the jejunum, and the caecum is part of the large intestine.