bronchiole


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bronchiole

 [brong´ke-ōl]
one of the successively smaller channels into which the segmental bronchi divide within the bronchopulmonary segments. adj., adj bronchi´olar.
respiratory b's the final branches of the bronchioles, communicating directly with the alveolar ducts; they are subdivisions of terminal bronchioles, have alveolar outcroppings, and themselves divide into several alveolar ducts.
Respiratory bronchiole. From Dorland's 2000.
( and see color plates.)
terminal bronchiole the last portion of a bronchiole that does not contain alveoli, i.e., one whose sole function is gas conduction; it subdivides into respiratory bronchioles.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

bron·chi·ole

(brong'kē-ōl), [TA]
One of approximately six generations of increasingly finer subdivisions of the bronchi, all smaller than 1 mm in diameter, and having no cartilage in its wall, but relatively abundant smooth muscle and elastic fibers.
Synonym(s): bronchiolus [TA]
Farlex Partner Medical Dictionary © Farlex 2012

bronchiole

(brŏng′kē-ōl′)
n.
Any of the fine, thin-walled, tubular extensions of a bronchus.

bron′chi·o′lar (-ō′lər) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

bronchiole

A conducting airway which begins at the last cartilaginous plate and ends at the last ciliated epithelial cell; bronchioli are any of 7–9 increasingly finer subdivisions of the bronchiolar tree (BT), measuring < 1 mm in diameter. In the distal BT, the respiratory epithelium becomes flatter, the ciliated cells fewer in number, the mucous glands less prominent and eventually disappear and, in the purely respiratory bronchioles, cuboidal nonciliated non-mucus-producing Clara cells appear.

Bronchiole types 
Respiratory bronchiole bronchiolus respiratorius MNA6
Any of 1–3 generations of ≤ 0.5-mm airways that connect terminal bronchioli to the alveolar ducts. Alveoli arise directly from the wall of RBs; the most distal RB is histologically characterised by an air space lined on one side by respiraotory epithelium and on the other by alveoli.
 
Terminal bronchiole bronchiolus terminalis NA6
Any of ±6 generations of purely conducting—i.e., nonrespiratory bronchioles—which connect; rare direct connections between TBs and alveoli may be seen, known as Lamberth’s canals.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

bron·chi·ole

(brong'kē-ōl)
One of approximately six generations of increasingly finer subdivisions of the bronchi, each smaller than 1 mm in diameter, and having no cartilage in its wall, but relatively abundant smooth muscle and elastic fibers.
Synonym(s): bronchiolus [TA] .
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

bronchiole

One of the many thin-walled, tubular branches of the bronchi, which extend the airway to the terminal air sacs (alveoli). Bronchi have cartilaginous rings, bronchioles do not.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

bronchiole

one of the smaller tubes branching off the two main bronchii in the lungs of higher vertebrates. See BREATHING and Fig. 81 .
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

Bronchiole

A thin air passage in the lung that branches off a larger airway.
Mentioned in: Bronchiolitis
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.

bron·chi·ole

(brong'kē-ōl)
One of approximately six generations of increasingly finer subdivisions of the bronchi, all smaller than 1 mm in diameter.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
In this paper, we report evidence that both carbonaceous and mineral dust are primarily distributed to the terminal and respiratory bronchioles and that there is anatomical remodeling within these same sites.
Myers et al (7) noted that some of their cases were confused with usual interstitial pneumonia because of the presence of interstitial fibrosis around the bronchioles, implying a significant amount of fibrosis, and in fact, Figure 4 in their original paper appears to be RBF.
In terms perhaps more useful for the pathologist on a daily basis, the term small airways includes membranous bronchioles, respiratory bronchioles, and alveolar ducts (29,36) (Figures 1 and 2).
Anomaly or loss of this surfactant is ended up with micro atelectasis in alveoli and respiratory bronchioles (Holm et al.
Also, the injuries sustained by the study animals endured are not consistent with bronchiolitis obliterans in humans given that the animal injuries are mostly of the nasal and upper respiratory track rather than the alveoli or bronchioles.
A, Peribronchiolar fibrosis is present and extends (as fairly fine fibrosis) a considerable distance from the bronchiole. The fibrosis is overlain by metaplastic bronchiolar epithelium, producing what looks like an exaggerated form of peribronchiolar metaplasia.
And, finally, there were increased collagen fibres due to hyperproliferation of fibroblasts in addition to mononuclear cell infiltration around the terminal bronchioles (Figure-10).
Cromolyn stabilizes bronchiole mast cells and inhibits release of inflammatory mediators.
The presence of bronchiolar-type epithelium in alveolar spaces around bronchioles, a reactive process that is the result of bronchiolar cell proliferation traveling through canals of Lambert that connect bronchioles to alveoli (also referred to as bronchiolar metaplasia), can be sufficiently exuberant to resemble a lepidic-pattern adenocarcinoma.
After the terminal bronchiole, the following seven generations of dichotomous divisions are called respiratory bronchioles and serve the gas-exchanging parenchyma consisting of budding alveoli.
ganglion bronchiole cementum malleolus zygomatic lacrimal ossicle ethmoid epigastric sacroiliac inguinal mesentery trigeminal ischium lymphocyte corpus callosum photoreceptor pterygoid maxillary sinus foramen magnum
Body Parts Spelling Bee Words Beginner (6 and under) hip head eye temple face cheek jaw scalp arm leg limb breast vein kidney ureter cord pons dura tube nail Junior (7 and 8) skin skeleton orbit pinna socket globe nasal space ear canal brain stem spinal cord vertebra tonsil spleen root lymph vocal cord nervous system frontal lobe cornea anvil Advanced (9 and 10) cranium hard palate soft palate suture lymph node dendrite hormone sclera stirrup olfactory vomer uvula epiglottis cricoid pharnyx pectoral intercostal acetabulum vena cava subclavian Super (11 and 12) ganglion bronchiole cementum malleolus zygomatic lacrimal ossicle ethmoid epigastric sacroiliac inguinal mesentery trigeminal ischium lymphocyte corpus callosum photoreceptor pterygoid maxillary sinus foramen magnum