Final answer:
Gas exchange between the environment and the body in human beings occurs in the alveoli.
Step-by-step explanation:
In human beings, gas exchange between the environment and the body takes place in the alveoli. Alveoli are small air sacs located at the end of bronchioles in the lungs. They are surrounded by capillaries, allowing for the exchange of oxygen and carbon dioxide. During inhalation, oxygen from the air enters the alveoli, while carbon dioxide produced by the body is released into the alveoli and then exhaled.
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