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Over a lifetime, the average human breathes enough air to fill around 95–100 hot-air balloons. FLAT-HEADED FROG Most frogs breathe through both their lungs and skin, but this rare Bornean flat-headed frog, which grows up to 3 in (7.7 cm) long, has no lungs. It is the only known f
The windpipe is the tube in the chest and throat that carries air in and out of the lungs.
Human lungs
An adult’s lungs take in an average of about 1 pint (0.5 liters) of air in each breath and breathe about 15 times a minute when sitting down.
Tennis court Bar-headed goose 21,670 ft (6,300 m)
Alveoli round sacs called alveoli—enough to cover about half a tennis court. efficient lungs and can cross the Himalayas at altitudes of around there is very little oxygen. Humans
FAST FACTS Lungs The average adult’s lungs contain 300–500 million tiny Himalayan mountain pass 18,000 ft (5,500 m) Bar-headed geese have very 21,670 ft (6,300 m), where cannot live permanently at such extreme heights.
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