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The ileum is the terminal portion of the [[Small Intestine - Anatomy & Physiology|small intestine]] and continues from the [[Jejunum - Anatomy & Physiology|jejunum]]. It opens into the [[Caecum - Anatomy & Physiology|caecum]] at the ileocaecal orifice. The intestinal epithelium is mainly absorptive, with much less digestion occuring compared to the [[Duodenum - Anatomy & Physiology|duodenum]] and the jejunum.
The ileum is the terminal portion of the [[Small Intestine - Anatomy & Physiology|small intestine]] and continues from the [[Jejunum - Anatomy & Physiology|jejunum]]. It opens into the [[Caecum - Anatomy & Physiology|caecum]] at the ileocaecal orifice. The intestinal epithelium is mainly absorptive, with much less digestion occuring compared to the [[Duodenum - Anatomy & Physiology|duodenum]] and the jejunum.
==Structure==
==Structure==
*The boundary between the ileum and [[Jejunum - Anatomy & Physiology|jejunum]] is arbitrarily distinguished by the position of the ileocaecal fold.
*The boundary between the ileum and [[Jejunum - Anatomy & Physiology|jejunum]] is arbitrarily distinguished by the position of the ileocaecal fold.
*It is more muscular and firmer than the [[Jejunum - Anatomy & Physiology|jejunum]].
*It is more muscular and firmer than the [[Jejunum - Anatomy & Physiology|jejunum]].