The small intestine is of great length (80 to 90 ft.), its mucous membrane being covered with numerous fine villi.
Celiac disease is a chronic, autoimmune disorder which affects the villi of your small intestine when gluten-containing foods are eaten.
This seemingly harmless protein triggers an immune response in the small intestine of people with gluten intolerance and those with celiac disease.
In fact, consuming even a small amount of gluten for people who suffer with celiac disease leads to inflammation of the small intestine which can also cause a number of unpleasant and possibly severe symptoms.
This is when the food enters the small intestine so quickly that nausea, sweating, weakness, diarrhea, and headache occur almost immediately after a meal.