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 ?
To affect the respiratory tree, the gaseous pollutants must be inhaled in a sufficient volume so that a minimal alveolar concentration is reached.
This system consists of several hundred tubules whose proximal ends attach to the basal part of the left respiratory tree and whose distal, blind ends float freely in the coelomic cavity.
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).
Respiratory tree: The structure in the chest composed of the trachea, bronchi, bronchioles, and alveoli.
BEF may, however, be silent for several decades for various reasons: (1) an occlusion of the opening by an oesophageal tissue fold or a 'flap valve'; (2) the presence of a membrane that subsequently ruptures; (3) the action of gravity (upward direction of the fistula from the oesophagus to the bronchi) preventing spillage of the oesophageal contents into the respiratory tree; (4) adaptation of patients to the minimal symptoms, and (5) spasm of the smooth muscle in the fistula wall [10, 11, 15].
The respiratory tree consists of tubes having many different diameters, from the smallest respiratory bronchial to the much larger trachea and larynx.
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.
The middle word -- syncitial -- refers to a syncitium, which means a "mass" or "clump." 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.
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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