Tight rings of muscles that control the movement of food through the organs of the gastrointestinal tract are villi.

Name: Tight rings of muscles that control the movement of food through the organs of the gastrointestinal tract are villi.
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The rings of muscles that control the movement of food through the organs of the gastrointestinal tract are sphincters, not villi. Villi are small finger-like projections in the lining of the small intestine that help absorb nutrients from food.

Tight Rings of Muscles That Control the Movement of Food