00:00Your lungs have a surface area the size of a tennis court.
00:03You take 20,000 breaths every single day.
00:07The lungs contain 300 million tiny air sacs called alveoli.
00:11If you spread all alveoli flat they cover 70 square meters.
00:15Your right lung is larger than your left lung.
00:18Lungs float on water because they are filled with air.
00:20You exhale 1 liter of water vapor every day without noticing.
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