....... is the function of nephrocytes and urecose glands.

The blood of a cockroach does not contain any respiratory pigment. This means that .........

Explain the reproductive system of a male cockroach.

In cockroaches,during the digestion of food,the enzyme cellulase is synthesized by:

In female cockroach,the $7^{th}$,$8^{th}$,and $9^{th}$ sterna form a genital pouch. Which of the following pairs of sterna are primarily involved in forming the brood or genital pouch?

The figure given below shows the alimentary canal of a cockroach with a few structures labelled as $1, 2, 3$ and $4$. Identify the structure which is also called proventriculus and helps in grinding the food particles.