<span>At the very end of it, it divides into two tubes called bronchus, which together they are called a bronchi. which then it connects your trachea to your lungs.
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Undigested substances are passed through the large instines I hoped I helped you
Simply walking alone can actually do both of these however if you are looking for multiple answers then here are some examples:
-Playing Sports
-Jogging
-Lifting Weights
-Swimming
-Dancing
-Bike Riding
etc...
Anyways, hope I helped!
