this diagram shows a mass of food as it moves along the small intestine. (a) draw an arrow in the diagram to show the direction in which the food is moving. (b) identify and name the movement shown in the diagram. how does this movement help in digestion of food.
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The involuntary constriction and relaxation of the muscles of the intestinal canal, creating wave-like movements which push the contents of the canal forward is known as peristalsis. Peristalsis helps the food move along the alimentary canal.
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