Zoology - Structural Organisation in Animals Question with Solution | TestHub

The foregut or stomodaeum of insects is lined by the cuticle. It consists of a buccal chamber, pharynx (short tubular), esophagus (narrow tubular), crop and gizzard.

Crop: It is a thin-walled, large-sized pear-shaped sac. It is the largest part of the foregut. It is meant for the storage of food.

Gizzard (or proventriculus): It is small but thick-walled. It is having a thick outer layer of circular muscles and thick inner cuticle with 6 highly chitinous plates known as teeth. It is meant for grinding and crushing of food.