Functions :
Crop : The oesophagus dilates to form a large thin walled pear shaped crop. The crop is very large part of the alimentary canal of the cockroach where food is stored. It opens into gizzard.
Gizzard : It is a thick walled, rounded structure whose walls are muscular and greatly folded. It has six muscular folds which are covered by chitinous conical plates, the teeth, used for grinding the food. Its wall consists of strong circular muscles which are needed by the gizzard for grinding.
