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by the water in the ocean
bronchioles.
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the upper respiratory track
The earthworm has no special respiratory organs. Gaseous exchange occurs through moist skin by diifusion.
Thick and moist
Endocrine glands
Spiracle, or a respiratory tube
When warm moist air rises it cools and condenses.
Usually it is done by means of lungs.
look it up in your biology book! a respiratory organ for the exchange of gases
The epiglottis.