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Respiratory System 2
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At the bottom of the windpipe there are two large tubes,these tubes are called the main stem bronchi.
One of these tubes leads to the left lung, while the other leads to the right.
Each main stem branches off into tubes called bronchi, these get smaller and smaller like branches on a tree.
The tiniest tubes are called bronchioles and there is about 30,000 of them in each lung.
At the end of each bronchiole is a special area that leads into clumps of tiny air sacks called alveoli.
There are about 600 million alveoli in your lungs and if you stretched them out, they could cover an entire tennis court!!!
Meer dan 30 miljoen
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