alveolar duct


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to alveolar duct: alveolar sac

al·ve·o·lar duct

1. the part of the respiratory passages distal to the respiratory bronchiole; from it arise alveolar sacs and alveoli;
2. the smallest of the intralobular ducts in the mammary gland, into which the secretory alveoli open.
Synonym(s): ductulus alveolaris

alveolar duct

A thin tubular structure that arises from respiratory bronchioles and gives rise to alveoli, which contain smooth muscle that constricts in response to parasympathetic stimulation and dilates in response to sympathetic stimulation. Alveolar ducts are lined by simple cuboidal cells.

al·ve·o·lar duct

(al-vē'ŏ-lăr dŭkt)
1. The part of the respiratory passages distal to the respiratory bronchiole; from it arise alveolar sacs and alveoli.
2. The smallest of the intralobular ducts in the mammary gland, into which the secretory alveoli open.
Synonym(s): ductulus alveolaris.
References in periodicals archive ?
Depending on local velocities, the swarm of particles exhibits a parabolic pattern in the alveolar duct (T = 0.25 s) and a spherical shape after entering the top alveolus (i.e., Sac 1, T = 0.50 s).
Organizing pneumonia (OP) is a nonspecific term for proliferations of fibroblastic tissue within small airways, alveolar ducts, and alveolar spaces.
One lab (ML4) observed O-MWCNTs primarily within alveolar ducts with little inflammation.
Differentiated bronchiolar epithelium in alveolar ducts of rats exposed to ozone for 20 months.
2004), whereas linear markings most likely reflect a disease process with a bronchiolar, peribronchiolar, and/or alveolar duct inflammatory component (Eschenbacher et al.
Qualitative light microscopic examination of the rat lungs to assess the distribution of the retained particulate material showed that the soot particles were mostly located in alveolar macrophages within alveolar and alveolar duct lumens (Figure 1) in all three exposure groups.
Hyaline membranes are composed of cellular and proteinaceous debris and appear as dense, glassy eosinophilic membranes lining the alveolar ducts and alveolar spaces (Figure 1).
Axial dispersion in respiratory bronchioles and alveolar ducts. J Appl Physiol 64(6): 2614-2621 (1988).
(28,29) Inflammation is followed by the formation of loose nonnecrotizing epitheliod cell granulomas in the bronchiolar wall and alveolar ducts. (29) In chronic HP, peribronchiolar and alveolar fibrosis often occurs.
Lung tissue not involved by tumor showed the exudative phase of diffuse alveolar damage (i.e.--interstitial edema, hyaline membrane lining alveolar ducts & alveolar spaces, marked alveolar capillary congestion) such type of metastatic deposits also noticed in heart & brain.
The alteration and infiltration of the stroma around the veins with leukocytes, as well as stroma loosening, were observed due to the exudation.After the EHF-therapy treating mice of the 3rd Group the alveolar ducts of tubular glands were lined with stratified prismatic epithelium.
Emphysema is defined in terms of anatomical changes to the distal, or peripheral, structures of the lungs, i.e., the terminal bronchioles, alveolar ducts, and alveolar sacs.