Question

Malpighian tubules are:

• A. Excretory organs of insects
• B. Excretory organs of annelids
• C. Respiratory organs of insects
• D. Respiratory organs of annelids

Answer 1

The correct option is A Excretory organs of insects

Malpighian tubules are excretory organs of insects. These are unbranched tubules lying almost freely in the haemocoel and open into the alimentary canal. The main function of these tubules is to absorb nitrogenous waste products. Spiracles are the respiratory systems of insects through a series of external openings. In primitive annelids, each compartment of the coelom is connected to the outside by ducts for the release of sex cells, and by paired excretory organs, or nephridia.