The lowest part of the small intestine , located beyond the duodenum and jejunum , just before the large intestine (the colon ). Pronounced "il-eum" in the US and "eye-leum" in the UK. See the entire definition of Ileum
The ileum is that portion of the small intestine lying between the jejunum and the large intestine. It is the final 3/5 of the small intestine lying chiefly below the umbilicus (navel) and to the right side of the pelvic region. Peyer's patches are larger and more numerous in the ileum than in the rest of the small intestine.
In anatomy of the digestive system, the ileum is the final section of the small intestine. It is about 2-4 m long in humans, follows the duodenum and jejunum, and is separated from the cecum by the ileocecal valve (ICV). The p H in the ileum is usually between 7 and 8 (neutral or slightly alkaline).