Which of the following is correctly stated as it happens in the common cockroach?

Step-by-step solution

This in turn opens into a sac-like structure called crop used for storing food. The crop is followed by gizzard or proventriculus. It has an outer layer of thick circular muscles and thick inner cuticle forming six highly chitinous plates called teeth. Gizzard helps in grinding the food particles. The entire foregut is lined by cuticles. A ring of 6-8 blind tubules called hepatic or gastric caeca is present at the junction of foregut and midgut, which secrete digestive juice. Excretion is performed by Malpighian tu