a) Name three parts of the body where smooth (involuntary or unstriated) muscle may be found.

b) In any one of your examples, say what the smooth muscle does.

(a) Smooth muscle is found in the wall of the alimentary canal, in arterioles and in the uterus.

(b) Contraction of smooth (circular) muscle of the alimentary canal produces peristalsis. In the    arterioles it causes vaso-constriction. In the uterus it helps to expel the fetus.