Trachea are the respiratory organ of Annelida.

Name the respiratory pigments of annelids?

What are the respiratory organs of arthropods?

List the respiratory organs of amphibians.

The respiratory system includes the respiratory tract, the respiratory organs and air sacs. What type respiration is seen in pigeon ?

The respiratory system includes the respiratory tract, the respiratory organs and air sacs. What are the functions of air sacs ?

……….are the respiratory organs in most of the aquatic arthropods and molasses.

The respiratory system includes the respiratory tract, the respiratory organs and air sacs. How many air sacs are present in pigeon. Name them ?