Lacking a trachea or respiratory tubes; used especially to describe certain arthropods without tracheal systems.
From prefix 'a-' meaning 'without' plus 'tracheate' from Latin 'trachia' meaning tube or wind-pipe, referring to respiratory structures.
Some tiny arthropods like mites and ticks are atracheate, meaning they literally have no lungs or wind pipes at all — instead they breathe through their skin!
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