How is the food propelled from one part of the alimentary canal to another?
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Food moves through the alimentary canal by the process of peristalsis.
The peristaltic movement involves coordinated smooth muscle movements. Circular smooth muscles of the alimentary canal, behind the chewed food(bolus), contract to prevent the food from moving backwards. This is accompanied by a simultaneous muscle relaxation, in the circular muscles in front of the bolus, allowing the bolus to pass. This movements are also combined by a longitudinal muscle contraction that are responsible for moving the bolus of food along the alimentary canal.
The peristaltic movement involves coordinated smooth muscle movements. Circular smooth muscles of the alimentary canal, behind the chewed food(bolus), contract to prevent the food from moving backwards. This is accompanied by a simultaneous muscle relaxation, in the circular muscles in front of the bolus, allowing the bolus to pass. This movements are also combined by a longitudinal muscle contraction that are responsible for moving the bolus of food along the alimentary canal.
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