 Dear students, in this topic we shall discuss the motility of the elementary canal. The ability of the elementary canal to contract and propel ingested material along its length is called the motility. Motility depends on the activity of the smooth muscle wall of the elementary canal and or ciliary lining of digestive tract in various animals. Motility is highly significant for the translocation and conduction of food along the elementary canal. It is also important for the mechanical treatment of food. It also prevents scumming. We will discuss these three significant features in detail. The translocation of food involves carrying of the food to various parts of the elementary canal. The process of translocation needs to be correctly timed along the entire length. Because of this translocation, food reaches the specialized regions for digestion and absorption in time. The timing is very important because the process of translocation of food reaches the food and time. For example, a part of the translocation is secreting the enzymes for some time and the food reaches the required timing. This timing is also important for the expulsion of fecal material. The elementary canal's motility has second function which is the mechanical treatment of food. The muscular activities of elementary canal are involved in grinding and kneading actions. These actions break the larger components of food into smaller soluble forms. When food converts into smaller soluble forms, it enables the enzymes and bile to act on the food. This action of grinding and kneading also mixes the digestive juices with the food contents present in the luminoff elementary canal. Dear students, the process of mixing and grinding occurs in the form of a small phenomenon which is called segmentation. Segmentation is a process in which the circular muscles of the elementary canal are involved and they have asynchronous contractions. Segmentation is a process in which only asynchronous contractions of circular muscles are involved. In the process of segmentation, longitudinal muscles do not participate. Because of this process, food rolls within a certain part of the digestive tract and as a result it is mixed and ground. Dear students, the motility of the digestive tract also keeps renewing the material in contact with the absorptive and secretive surfaces of epithelial lining. The material that is passing through the epithelial lining is being renewed because of the motility. Because of this, the food content that is passing through the digestive tract does not stop at any place and does not form a layer formation. This process which is called scumming can cause clogging of the surfaces. If clogging occurs and layer formation occurs, then the absorptive and secretive areas are reduced. And this motility prevents this type of layer formation.