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Wednesday, October 12, 2011

Lungs


Lungs is located inside the chest cavity (thorax). Inside the lungs, bronchioles branch into smaller and smooter branches. These smooth branches form a sac at its end called alveolus. Inside the alveolus occurs oxygen and carbon dioxide exchange.
(Source: Science Focus.2009. Science for elementary school Va.Bogor: Yudhistira) .
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