tracheole

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tracheole

(trā′kē-ōl′)
n.
One of the very small, branching tubes at the tips of the tracheae of an arthropod. Oxygen and carbon dioxide diffuse through the walls of the tracheoles.

tra·che′o·lar (-ə-lər) adj.

tracheole

the small branching tubes from the TRACHEAE (2) of insects.