abnormal enterocyte morphology abnormal small intestine morphology abnormal small intestinal villus morphology MP:0008108 MPheno.ontology abnormal small intestinal villi any structural anomaly of the tiny hair-like projections that protrude from the inside of the small intestine that contain blood vessels that capture digested nutrients that are absorbed through the intestinal wall; the villi increase the absorptive surface area of the small intestine by approximately 30-fold