Respiration
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Alveoli is where gas exchange occurs.
Alveoli- these are the small sac-like structures where gas exchange occurs with the blood. Its creates an ideal site for gas exchange between the air in the lungs and the blood in the capillaries.
The gas occurs by simple diffusion through the cells.
Alveoli
gas exchange occurs between the thin walls of the alveoli and the thin walls of the capillaries
The Gills
alveoli
Gas exchange can also be referred to as respiration. This process involves the uptake of oxygen and release of carbon dioxide in living organisms. It occurs in specialized organs such as the lungs in mammals and gills in fish.
Rattlesnakes have lungs and gas exchange occurs there.
That is a natural physiological process that occurs in the lungs. It is usually referred to as gas exchange, where the blood is enriched with oxygen as it looses most of its load of carbon dioxide.