Worms are provided with mouth, pharynx, esophagus, crop, gizzard, and intestine as part of their digestive system. they use their mouth to grab and hold food while the pharynx is used during the suction so that food is gets inside the body of the worm, as food is inside the gizzard will grind the food and with the aid of crop that secretes digestive fluid and finally in the intestine nutrients are then absorbed.