What are the waste products removed by lungs ?

Explanation

Vertebrates are divided into three categories based on nitrogenous waste excretory products. They are :
1) Ammonotelic animals : The animals which excrete ammonia as nitrogenous waste products are called ammonotelic animals. These are aquatic organisms.
Ex : Some bony fishes.
2) Ureotelic animals : The animals which excrete urea as their chief nitrogenous waste are called ureotelic animals.
Ex : Earth worms, cartilaginous fishes, most of the amphibians and mammals.
3) Uricotelic animals : These animals excrete their nitrogenous waste products in the form of uric acid.
Ex : Reptiles, birds.