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Figure 1: Normal villi and villi damaged by gluten

The surface of the jejunum is abnormally flat (panel B) due to the loss (atrophy) of villi, the small finger-like projections that increase the intestine’s surface area, due to the adverse immune response to gluten in patients with coeliac disease. A) Micrograph of normal villi B) Micrograph showing villi damaged by coeliac disease

Source  Courtesy of Prof David Sanders