Describe the smooth muscle layers in the wall of the esophagus, stomach, small intestine & large...

Describe the smooth muscle layers in the wall of the esophagus, stomach, small intestine & large intestine; include the number of layers and layer arrangement & how this is functionally important

Expert Solution

Commonly alimentary canal has 2 layers of muscle that contract in opposite direction to move the food through (peristalsis)
This leads to guide the bolus to the direction of stomach throgh the esophagus
gastroesophageal sphincter opens and the bolus enters to the stomach
stomach has 3 layers
food enters the stomach and distension of the wall of stomach to cause the peristaltic movement. This movements called mixing wave begin to mix the food with stomach secretions
Repaetedly relaxation of the fundus and body of the stomach will allow the stomach wall to accomodate more volume of food and enters to duodenum by opening the pyloric sphincter after pushing by peristalsis.
In duodenum(small intestine) the chyme is taken up and peristalsis occurs.
The ileocecal sphincter opens to enter the chyme into cecum
in large intestine the fecal matter moves in the rectal direction and further to open the anal sphincter and defecated out.

Sydney Mullin answered 1 year ago

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