Answer :

Final answer:

Like chickens & some dinosaurs, cockroaches have this internal muscular organ where they grind their food known as proventriculus.

Explanation:

Cockroaches have an internal muscular organ called the proventriculus where they grind their food. The proventriculus is a part of the digestive system in cockroaches and performs the function of breaking down food particles into smaller pieces. It is located between the foregut and the midgut, and its main purpose is to facilitate the digestion process.

The proventriculus in cockroaches can be compared to the gizzard in chickens and some dinosaurs. The gizzard is a muscular organ in these animals that also grinds food particles. It contains small stones or grit, which help in the mechanical breakdown of food. In conclusion, cockroaches have an internal muscular organ called the proventriculus that grinds their food. This organ is similar to the gizzard found in chickens and some dinosaurs, both serving the purpose of breaking down food particles into smaller pieces.

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