• The exoskeleton of cockroach has hardened chitinous plates called sclerites which are joined to each other by a thin and flexible articular membrane called arthrodial membrane that permits elasticity and flexibility.

• Ootheca are dropped or glued to a suitable surface, usually in a crack or crevice of high relative humidity near a food source.

• Oomatidia are present in the compound eyes of cockroaches and with the help several ommatidia, a cockroach can receive several images of an object. This kind of vision is called as mosaic vision that has more sensitivity and less resolution.

• Male gonapophysis or phallomere surrounds the male gonopore.