Introduction
The ileum is the terminal portion of the small intestine and continues from the jejunum. It opens into the caecum at the ileocaecal orifice. The intestinal epithelium is mainly absorptive, with much less digestion occuring compared to the duodenum and the jejunum.
Structure
Vasculature
- The cranial mesenteric artery supplies blood to the ileum.
- see jejunum
Histology
- Peyer's Patches, part of the mucosal associated lymphoid tissue (MALT), are present throughout the ileum and ileocaecal junction.
- They contain B and T lymphocytes.
- B lymphocytes exist in follicles.
Links
Pathology of the Small and Large Intestines