Zoology - Structural Organisation in Animals Question with Solution | TestHub

Cockroaches belong to phylum Arthropoda and class Insecta. The body is divided into head, thorax, and abdomen. Head bears compound eyes that are responsible for mosaic vision because each eye has many lenses. The brain is in the form of ganglia and nerves arise from these ganglia to supply eyes and antennae. Nephrocytes are major structures for excretion. Fat bodies and uricose glands in males are also for the same function. The ootheca is a dark reddish to blackish brown capsule, about 3/8" (8 mm) long in female reproductive structure, where the collateral glands secrete oothecal cover.