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The lungs are the site of gas exchange in mammals. Lungs ensure that efficient gas exchange takes place between the air and the person's blood. The lungs are a pair of lobed structures made up of a series of highly branched tubules called bronchioles, which end in tiny air sacs called the alveoli (the alveolar membrane is the site of gas exchange). Lungs allow us to take in oxygen from the external air and allow us to get rid of excess carbon dioxide. They are the structures that help us breathe and they are an important part of our life.

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16y ago

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