alveoli
gas exchange occurs between pulmonary capillaries and the alveoli in the lungs.
Rattlesnakes have lungs and gas exchange occurs there.
Simply put, the gas exchange occurs in the lungs. More specifically, the blood exchange occurs at the avoli, the "air sacs" in the lungs where the surrounding capillaries can be oxygenated.
There is exchange of CO2 and O2 in the lungs of aerobic vertebrates. The process is generally referred to as gas exchange. It depends on what organism you're talking about. It could be the skin, gills, lungs, or any other structure. In the lungs is the Alveoli.
alveolus
Gas exchange between the body and the environment occurs in the lungs.
Book lungs.
The exchange of gases occurs at the ends of the airways in the lungs. Here tiny sacs called alveoli connect with tiny blood vessels and here exhaust gas [carbon dioxide] is exchanged for fresh gas [oxygen].
alveolus (tiny air sacs arranged in clusters in the lungs, in which the exchange of oxygen and carbon dioxide takes place.)
The actual air exchange takes place in the alveoli of the lungs
Gas exchange occurs across the respiratory membrane of the alveoli; however, the short answer is simply alveoli
Gas exchange occurs in the alveoli of the lungs.