 Dear students, in this topic, we shall discuss the two mechanisms of motility of the elementary canal that is muscular and c-leary motility. The elementary canal uses two types of mechanisms which are quite different from each other for achieving motility. These are muscular motility and c-leary motility. The muscular motility mechanism is used by arthropods and cordates. It is used for the conduction of food content through the elementary canal. This mechanism involves the contractions of muscles of the wall of elementary canal. Muscular motility enables or permits handling of larger and harder pieces of food. In cordates, muscular motility is strictly by smooth muscle fibers, which contract and relax rhythmically. This movement or this pattern is known as peristalsis. Peristalsis pushes the food throughout the digestive tract. Arthropods may be muscular motility but that is achieved by the contraction of skeletal striated muscle fibers. Now, we shall discuss the second mechanism of motility that is c-leary motility. This mechanism is used by the elementary canals of anelids, many molusks, tunicates and cephalocordates. This mechanism involves the beating of c-lea which line the digestive tract. C-lea generate fluid crents and these fluid crents propel food in the digestive tube. C-leary action causes larger or harder pieces of food to not be moved. So, smaller particles or liquid form may occur. Dear students, some animals, in which canodums and most of the molusks come, they use both these methods. Their lining of the digestive tract is muscular but is also lined with c-lea so they use both these mechanisms simultaneously.