Which of the following statements regarding small intestine are incorrect?
(i) Throughout the small intestine, there are crypts of Lieberkuhn at the base of the villi.
(ii) In duodenum, there are, in addition, small rounds peptic glands.
(iii) The small intestine is strongly -self-protective; by means of a copious production of mucus and a mechanism for the rapid replacement of cells I damaged by contact with fooiLapd. digestive juices.
(iv) Each villus is richly supplied with blood capillaries only.