Jejunum
The jejunum lies between the duodenum and the ileum and is considered to start at the suspensory muscle of the duodenum, a location called the duodenojejunal flexure. The division between the jejunum and ileum is not anatomically distinct due to the fact that in adult humans, the small intestine is usually 6-7m long, about two-fifths of which (2.5 m) is the jejunum.
Large intestine
The taenia coli run the length of the large intestine. Because the taenia coli are shorter than the large bowel itself, the colon becomes "sacculated", forming the haustra of the colon which are the shelf-like intraluminal projections.