The tubular heart of a cockroach has how many chambers?

Explain the reproductive system of a female cockroach.

In a cockroach,from where do the hepatic caecae arise?

Which of the following statements is correct regarding the cockroach?

Describe the digestive system of a cockroach.

Complete the following statement :
$(a)$ In cockroach,grinding of food particles is performed by ........ .
$(b)$ Malpighian tubules help in the removal of ........ .
$(c)$ The hindgut of the cockroach is differentiated into ........ .
$(d)$ In the cockroach,blood vessels open into spaces called ........ .