The body cavity in a cockroach is also known as ........

The body cavity of a cockroach is also called:

Statement-$I$ :- Heart of cockroach consists of an elongated muscular tube lying along the mid-dorsal line of the thorax and abdomen.
Statement-$II$ :- In cockroach,the opening of the spiracles is regulated by the sphincters.

What is the similarity between the trachea of a cockroach and a rabbit?

Identify the location and function of the following glands in cockroaches:
$(i)$ Conglobate gland
$(ii)$ Collateral gland

Which of the following is absent in the mouthparts of a housefly?