Food is allowed into this organ, whose first segment absorbs iron, by the pyloric sphincter.
An autoimmune disease that affects this organ is called celiac (SEE-lee-ak) disease, and a Meckel's (MECK-ulz) diverticulum (DYE-vur-TICK-you-lum) can occur here at birth. This organ is where Vitamin B 12 is absorbed. Food is allowed into this organ, whose first segment absorbs iron, by the pyloric sphincter. For 10 points, name this organ lined by villi, whose three segments are the duodenum, jejunum, and ileum.
An autoimmune disease that affects this organ is called celiac (SEE-lee-ak) disease, and a Meckel's (MECK-ulz) diverticulum (DYE-vur-TICK-you-lum) can occur here at birth.
{small intestine}