respiratory organs of various animals
Body surface - Invertebrates like sponges , coelentrates, flatworms etc., exchange O2 and CO2 through simple diffussion.
Earthworm use their moist cuticle and insects have a network of tracheal tubes to transport atmospheric air within the body.
Gills are ysed by Arthropodsand Molluscs
Lungs are used by terrestial forms for the exchange of gases.
Through Plasma Membrane. In unicellular animals, such as amoeba, exchange of gases takes place through cell surface. ...
Through Body Wall or Skin. Tapeworms, earthworms, and leeches use their skin for the exchange of gases. ...
Through Tracheal System. ...
Through Gills. ...
Gills?? Examples: aquatic arthropods and fishes
Lungs?? Example: terrestrial forms (reptiles, birds, and mammals)
Moist Skin?? Example: earthworm, frogs also respire through skin when present in the moist area, etc.