The exoskeleton of a cockroach is composed of .........?

How does $Periplaneta\ americana$ differ from $Blatta\ orientalis$?

Give general information about cockroach.

Which of the following statement$(s)$ is/are correct regarding cockroaches?
$(i)$ The body of the cockroach is segmented and divisible into three distinct regions - head,thorax and abdomen.
$(ii)$ Blood vascular system is of closed type.
$(iii)$ They are monoecious and both sexes have well developed reproductive organs.
$(iv)$ The development of $P. americana$ is paurometabolous,meaning there is development through nymphal stage.

The exoskeleton of cockroaches and other insects is composed of which of the following?

Explain the head of a cockroach.