Chicken gizzard is the stomach of chickens and ducks, and some people in other places call it chicken gizzard, chicken fungus and chicken gizzard. The stomach of birds is divided into muscular stomach and glandular stomach. The latter does not secrete much gastric juice, while the former is not only bulky, but also responsible for storing and grinding food. Birds have no teeth, and the pebbles they swallow are stored there. Therefore, chicken gizzards, as the stomach of chickens, have the function of helping chickens digest. It can be said that the chicken gizzard refers to the stomach of a chicken or duck.