Digestive movements of the small intestine


 Digestive movements of the small intestine


         Digestive movements of the small intestine- the chyme coming from the stomach are pushed in the large intestine by the serial movements of intestinal long and circular smooth muscles after mixing it with digestive juices. Mainly two types of muscular actions take place in the small intestine that is helpful in the digestion of food-

1.     Segmenting contractions- The intestine is divided in to two segments by fast contraction in circular smooth muscle. In the area between these two segments, semi liquid food (chyme) is present. After that, the segments are become relax (loose). This process goes on happening in the circular muscles for a certain period of time. When the chyme reaches in the small intestine first time, the duodenum and ileum are divided into different parts at once.

2.     Peristaltic contractions- These are waves like movements that start from the stomach and moves forwards gradually. Due to it, the chyme reaches in large intestine from small intestine. Each of the waves takes 100 to 150 minutes to reach in the last section of small intestine from its starting point. After reaching peristaltic contractions to the end of small intestine, new waves start on the starting point. Hormone named motilin controls peristaltic contractions.