It is known that the swimming bladder of fishes becomes developed into the lungs of air-breathing vertebrates and man himself.
The organs of air-breathing are called, in general, lungs (pulmones).
It is also singular that the Land-snails at once appear instead of the intermediate forms of the air-breathing fresh-water snails.
It was as if some great, air-breathing sea-monster was exhaling beneath the waves.
Besides this, millions of air-breathing animals die, without leaving anything behind them to mark their existence.
Man, in common with all air-breathing animals, has two nasal cavities.
In this fish, which not only leaves the water, but is said to climb trees, the air-breathing organ is greatly developed.
And in Nova Scotia the bones of air-breathing reptiles and land snails have been discovered.
air-breathing in fishes was originally performed by the unchanged walls of the œsophagus perhaps at specially vascular localities.
Slab of sandstone from the coal-measures of Pennsylvania, with footprints of air-breathing reptile and casts of cracks.
acquiring oxygen from the air
Tests have been completed on air-breathing rocket engines.