# What is the ileum?

It is called the ileum. Gray's Anatomy (1918) describes it as the final segment of the small intestine.

## What it means

- The final segment of the small intestine.
- Thinner and narrower than the jejunum.
- Absorbs vitamin B12, bile salts, and remaining nutrients.

## Action steps

1. Between the jejunum and the cecum.
2. Occupies the lower right of the abdomen and the pelvis.
3. Joins the cecum at the ileocecal valve.

## Sources

- [Gray's Anatomy of the Human Body (1918)](https://www.bartleby.com/107/)

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