In cockroach, which of the following is related to the proventriculus (Gizzard)?

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It is the first part of the mesenteron

It secretes amylases, proteases and lipases

It has an outer layer of thick circular muscles and thick inner cuticle forming six highly chitinous plates called teeth

It is lined by only endoderm

answer is D.

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Detailed Solution

Proventriculus (Gizzard) in cockroach is the distal part of foregut and has an outer layer of thick circular muscles and thick inner cuticle forming six highly chitinous plates called teeth. It helps in grinding and filtration of food. It is lined by ectoderm.

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