Question

who have the most efficient respiratory system?

Answer 1

hell.. ooo

mammals have a far more efficient respiratory system than a fish and a bird has a far more efficient respiratory system than a mammal

hope this helps you....!!

Answer 2

In the avian lung, the gas exchange occurs in the walls of microscopic tubules, called 'air capillaries.' The respiratory system of birds is more efficient than that of mammals, transferring more oxygen with each breath. This also means that toxins in the air are also transferred more efficiently.