The structure of the muscular stomach is suit for its carnivorous feature and its wall is thin having pleats and strung retractility, which have the function of saving food except digesting food.

• 肌胃的结构适于其食肉特性，壁薄，内有粘膜褶，伸缩性较大，其作用除消化外，尚有储食功能；