Correct Answer: stomach

Solution : The correct option is Stomach

Smooth muscles in the stomach serve an important function in digestion and food movement. These muscles facilitate mechanical digestion by mixing and churning the food with stomach secretions. They also aid in the movement of partly digested food from the stomach into the small intestine for further digestion and absorption. The autonomic nervous system controls the contraction and relaxation of smooth muscles in the stomach, which occurs automatically and allows for effective digestion and nutrient transport .