Explain how the crustaceans differ from the insects. 1.Excretory organ of the crayfish. Material found in the exoskeleton of an insect. The respiratory organ of the spider.
Deposits eggs into the soil.
Digests food in the insects. The parasitic arachnid. 9.Respiratory organ of the fly. The Raid Chemical Company is always trying to develop new and improved insecticides. The following experiment was conducted using the common house fly.