Compare rugae and plicae circulares (circular folds) with respect to the following items: organ where they are located general appearance purpose permanence . Compare intestinal villi and plicae circulares (circular folds) with respect to: size purpose What is the role of each of these in the intestinal villi? blood capillaries lacteals Contrast the jejunum and colon walls with respect to: villi muscle layers circular folds (plicae circulares) Compare the amount of fluid that is taken into the mouth vs. the amount that is eliminated in the feces. What is a colorectal polyp?