celiac disease. cross section of a small intestine

small intestine celiac disease cross villi damaged gluten intolerance autoimmune disorder sensitivity villous atrophy gastrointestinal symptom wheat allergy glutenfree diet immune response protein genetic intestinal biopsy malabsorption deficiencies oats complications gut anatomy bowel health villus digestive medical science diagram anatomical healthy microvilli body structure surface ileum tract epithelium coeliac unhealthy medicine ill normal diarrhea disease villi intolerance sensitivity vector