duct

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Related to alveolar duct: alveolar sac

duct

1. any bodily passage, esp one conveying secretions or excretions
2. a narrow tubular cavity in plants, often containing resin or some other substance
3. a channel or pipe carrying electric cable or wires

Duct

A nonmetallic or metallic tube for housing wires or cables, may be underground or embedded in concrete floor slabs; a duct usually fabricated of metal, used to transfer air from one location to another.

duct

[dəkt]
(anatomy)
An enclosed tubular channel for conducting a glandular secretion or other body fluid.
(communications)
An enclosed runway for cables.
(geophysics)
The space between two air layers, or between an air layer and the earth's surface, in which microwave beams are trapped in ducting. Also known as radio duct; tropospheric duct.
(mechanical engineering)
A fluid flow passage which may range from a few inches in diameter to many feet in rectangular cross section, usually constructed of galvanized steel, aluminum, or copper, through which air flows in a ventilation system or to a compressor, supercharger, or other equipment at speeds ranging to thousands of feet per minute.

duct

1. ,See air duct.
2. In electric systems, a metallic or nonmetallic tube, (usually circular, oval, rectangular, or octagonal) for housing wires or cables; may be underground or embedded in concrete floor slabs.

duct

A thin-wall tube installed in aircraft air-conditioning and heating systems to carry heated or cooled air for distribution to various aircraft locations.
References in periodicals archive ?
2]-NB-exposed mice show inflammatory lesions primarily localized to alveolar duct bifurcations.
3] exposure and remodeling of the distal airways, including an increase in nonciliated cell mass and volume fraction in terminal bronchioles and bronchiolarization of the alveolar duct (Plopper et al.
Some cases of organizing DAD may, however, contain comparatively prominent intraalveolar or alveolar duct fibrosis and therefore, OP may arise in the histologic differential diagnosis.
Hyperinflation and linear markings are radiologic evidence of bronchiolar, peribronchiolar, and/or alveolar duct inflammation (Calderon-Garciduenas et al.
Septum of alveolar duct or alveolus Including septa of alveolar outpocketings of respiratory bronchioles in humans 9.
6 mm within the walls of respiratory bronchioles and adjacent alveoli; nodules, defined as fibrotic lesions up to 1 cm in size with round, irregular, or serpiginous borders and containing dust-laden macrophages; and interstitial fibrosis, defined as diffuse or irregular fibrosis of alveolar septa and/or alveolar ducts.
the terminal bronchioles, alveolar ducts, and alveolar sacs.
Organizing pneumonia is diagnosed by its histopathologic pattern of fibroblastic plugs within alveolar ducts and inflammatory changes in the surrounding alveoli with varied bronchiolar involvement.
Respiratory bronchioles have occassional alveoli budding from their walls, while alveolar ducts are completely lined with alveoli.
In Figure 1, A and B, normal lung parenchyma is shown for comparison, with its delicate, intact alveolar septa and open, aerated alveoli and alveolar ducts.