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CBSE Class 10 Answered

what does longitudinal layer, circular layer, oblique layer and rugae secretes?
Asked by mohanapriya.priya31 | 01 Jun, 2020, 02:36: PM
answered-by-expert Expert Answer
  • The interior of the stomach is a rough surface of large folds, ridges of muscle, called rugae. The stomach secretes acid and enzymes that digest food. 
  • The outer longitudinal layer – This layer is composed of smooth muscle, continuous with the smooth muscle which surrounds the esophagus. It is a layer of nerves which cause peristalsis, movement of the muscle itself. The peristalsis allows food to mix. 
  • The middle circular layer – This layer of smooth muscle is called the circular layer and lies beheath the longitudinal muscle layer. The normal constriction of this muscle is what creates the pyloric sphincter, which controls the movement of chyme into the duodenum. 
  • The inner oblique layer – This layer of smooth muscle is the middle layer called the circular layer. It wraps around the body of the stomach, extending downward to form the pyloric sphincter along with the circular muscle layer. This layer is responsible for creating the motion that churns and physically breaks down the food. It is the only layer of the three which is not seen in other parts of the digestive system. 
Answered by Sheetal Kolte | 01 Jun, 2020, 07:15: PM

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