respiratory tree


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respiratory tree

[′res·prə‚tor·ē ‚trē]
(anatomy)
The trachea, bronchi, and bronchioles.
(invertebrate zoology)
Either of a pair of branched tubular appendages of the cloaca in certain holothurians that is thought to have a respiratory function.
References in periodicals archive ?
The histological organization of Cuvierian tubules, which is quite different from that of the left respiratory tree that bears them, appears to be functionally important for their correct operation (VandenSpiegel and Jangoux, 1987).
Stage 1 corresponds to the healing of the damaged tissues followed by the appearance, 2 to 6 days after autotomy, of a thickening of the wall of the basal part of the left respiratory tree, at the place where the expelled tubules were attached (S1; Figs.
The resulting wound is relatively limited and is rapidly closed by migration of mesothelial cells on the coelom side and epithelial cells on the side of the respiratory tree lumen.
Regeneration sensu stricto takes place right after wound healing and starts with the formation of a small mesothelial bud that appears as a local thickening of the wall of the basal part of the left respiratory tree.
In infants, RSV can not only infect the entire respiratory tree, but it can sometimes affect the respiratory centers in the central nervous system resulting in apnea, or cessation of breathing.
This virus, when it infects, attacks the respiratory mucosa, the delicate cells that line the entire length of the respiratory tree from the nostrils to the tiniest respiratory bronchioles and alveoli.
As the infection marches down the respiratory tree however, symptoms can become considerably worse.
The structural and architectural components of the respiratory tree work within other vagal afferent receptor sites that participate in breathing.
As the viral inflammation descends the respiratory tree, the symptom complex changes.
The respiratory tree has up to 28 generations or divisions of airways beginning with the trachea, which forks at its base to form two primary bronchi.
The respiratory tree supplying these alveoli with air and blood supply has approximately twenty three generations of divisions.

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