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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

tracheole

the small branching tubes from the TRACHEAE (2) of insects.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Internally, tracheae branch repeatedly until microscopic divisions (tracheoles) of the system make contact with metabolically active tissues.
The degree of coiling of ovarian tracheoles was then observed to determine if the female is parous or nulliparous.
In myriapods and insects, oxygen diffuses through the spiracles and along the tracheae and tracheoles to the metabolically active tissues.
(A) Female reproductive system of Scyphophorus acupunctatus formed by 2 ovaries (ov), germarium (g), vitellarium (v), oocyte (o), lateral oviduct (lo), common oviduct (co), spermatheca (s), and genital chamber (gc); (B) Distal part of the germarium (g) with bulky appearance possibly with trophocytes, prefollicular cells, and oogonia, terminal filament (tf), trachea (tr), tracheoles (trl); and (C) Approach to the onset of vitellarium with oocytes in development, germinal vesicle (gv), interfollicular tissue (tif), trachea (tr), and tracheoles (trl).