Question

Name the Class, in which organism possess lungs which are connected with air-sacs ​

Answer 1

Explanation:

Gas exchange in the lungs occurs in millions of small air sacs called alveoli in mammals and reptiles, but atria in birds. These microscopic air sacs have a very rich blood supply, thus bringing the air into close contact with the blood.

Answer 2

Answer:

i think it is trachea