Read the following statements with reference to the villi of small intestine. <br>
(i) They have very thin walls.
(ii) They have a network of thin and small blood vessels close to the surface. <br>
(iii) They have small pores through which food can easily pass. <br>
(iv) They are finger-like projections. <br>
Identify those statements which enable the villi to absorb digested food.
