What organisms develop specialized respiratory organs?

For a long time, animals breathed over the entire surface of their bodies. Land animals, such as earthworms, through wet skin. For the first time, special respiratory organs appeared in marine annelids – these were the external gills. Crustaceans and marine molluscs also breathe with gills, which are skin formations. But fish have internal gills. With access to land, the respiratory organs also changed: in arachnids and insects – respiratory tubes – trachea, and in vertebrates, starting with amphibians – lungs.