The terminal ileum is part of the digestive system. The most distant portion of the small intestine, it aids in digestion by absorbing materials not previously digested by the jejunum, the middle portion of the small intestine.
Ileum (“twisted intestine”) is the final and the longest portion of the small intestine, the ileum measures about 3 m (9.8 ft ) and contributes to almost 60% of the length of the small intestine. The ileum joins the large intestine at a smooth muscle sphincter called the ileocecal sphincter (valve).
The ileum is a specific section of the digestive system, which is one part of the small intestine. Distal is an anatomical term describing the positioning of a body part relative to a central point. The distal ileum is actually the end portion of the small intestine, before it transitions into the large intestine.