Breathing and Exchange of Gases — BIOLOGY STD 11 Science — Question

$(i)$ 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 seves have well developed reproductive organs.

$(iv)$ The development of P. americana is paurometabolus, meaning there is development through nymphal stage.