How does the avian respiratory system work?

Answer 1

The respiratory system of a dragonfly works as the tracheae tubes of the dragonfly takes the oxygen molecules to the cells.

They open on the stigmata, the 2 holes that can be see on both sides of the thorax.

Answer 2

Most fish can only breathe water. They do this by pulling water in through their mouths, and forcing the water back out through their gill slits (which are located behind their heads). As water passes through the gill slits, capillaries absorb oxygen from the water and release carbon dioxide into the water.

However, there are some fish (called lungfish) which evolved lungs. These fish can breathe air when necessary, but usually breathe water.

Answer 3

Well this is a question that would need a long answer. So to find a shorter and better explained answer go to

(http://people.eku.edu/ritchisong/avian_biology.html).