 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 discuss these three significant features in detail. The translocation of food involves carrying of the food to various parts of the elementary canal. This 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 end time time. For example, a part of the translocation is secreting the enzymes for a while and food reaches the end time. That is the required timing. This timing is also important for the expulsion of fecal material. Translocation process also sends fecal material from the body but we know very well that this timing is very important. If fecal materials come out of the body, then it causes certain diseases and problems. 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 lumen of elementary canal. Dear students, this process of mixing and grinding occurs in the process of grinding occurs by a 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. And this is not in the digestive tract but at certain points of the gut. In the process of segmentation, longitudinal muscles do not participate. This process causes food to roll within a certain part of the digestive tract and as a result it is mixed and ground. Dear students, motility of the digestive tract also keeps renewing the material in contact with the absorptive and security surfaces of epithelial lining. Motility of the digestive tract also keeps renewing the material in contact with the absorptive and security surfaces of epithelial lining. This is why the food content that is constantly 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, layer formation occurs, then the absorptive and security areas are reduced. And this motility prevents this type of layer formation.