Bronchiole: Difference between revisions

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Revision as of 16:28, 27 December 2006 editChenxlee (talk \| contribs)Extended confirmed users1,112 editsm Removed random parenthesis← Previous edit		Revision as of 03:08, 19 January 2007 edit undoBetacommand (talk \| contribs)86,927 editsm Removing selflinksNext edit →
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	Image:Tertiary bronchus.JPG\|Cross sectional cut of primary bronchiole		Image:Tertiary bronchus.JPG\|Cross sectional cut of primary bronchiole
	Image:Illu bronchi lungs.jpg\|Bronchi, bronchial tree, and lungs		Image:Illu bronchi lungs.jpg\|Bronchi, bronchial tree, and lungs
	Image:illu_quiz_lung05.jpg \|1. ]<BR>2. ]<BR>3. ]<BR>4. ]<BR>5. ]<BR>6. ]<BR>7. ]		Image:illu_quiz_lung05.jpg \|1. ]<BR>2. ]<BR>3. ]<BR>4. ]<BR>5. Bronchiole<BR>6. ]<BR>7. ]
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Revision as of 03:08, 19 January 2007

Bronchiole
Diagram of the alveoli with both cross-section and external view.
Identifiers
MeSH	D055745
TA98	A06.5.02.026
TA2	3282
TH	H3.05.02.0.00005
FMA	7410
Anatomical terminology[edit on Wikidata]

The bronchioles are the first airway branches that no longer contain cartilage. They are branches of the bronchi, and are smaller than one millimetre in diameter.

There are no glands or cartilage in any of the bronchioles, and the epithelial cells become more cuboidal in shape.

Divisions

Bronchioles divide until they become terminal bronchioles.

After these the respiratory bronchioles have sporadic alveoli on their walls.

Eventually the respiratory tract branches into alveolar ducts, then alveolar sacs.

Pathology

Bronchospasm, a life-threatening situation, occurs when the smooth muscular tissue of the bronchioles constricts, severely narrowing their diameter. Bronchospasm is commonly treated by oxygen therapy and bronchodilators.

The medical condition of inflammation of the bronchioles is termed bronchiolitis. Diseases of the bronchioles include asthma, bronchiolitis obliterans, respiratory syncytial virus infection, and influenza.

Additional images

Cross sectional cut of primary bronchiole
Bronchi, bronchial tree, and lungs
1. Trachea
2. Mainstem bronchus
3. Lobar bronchus
4. Segmental bronchus
5. Bronchiole
6. Alveolar duct
7. Alveolus

External links

Histology image: 13607loa – Histology Learning System at Boston University

Anatomy of the lower respiratory tract

Respiratory tree

Trachea	Tracheal rings Annular ligaments Carina
Bronchi	Main left right Secondary eparterial Tertiary

Lungs

General	Landmarks Base Apex Root Hilum Fissures Horizontal Oblique Superior lobe Lingula of left lung Middle lobe of right lung Inferior lobe
BP segment	Bronchiole: Conducting zone (Terminal bronchiole) Respiratory zone (Respiratory bronchiole Alveolar duct Alveolus Blood-air barrier)
Cells	Alveolar cells Type I Type II Club cell Goblet cell

Category:

Respiratory system

Revision as of 16:28, 27 December 2006 editChenxlee (talk \| contribs)Extended confirmed users1,112 editsm Removed random parenthesis← Previous edit		Revision as of 03:08, 19 January 2007 edit undoBetacommand (talk \| contribs)86,927 editsm Removing selflinksNext edit →
Line 35:		Line 35:
	Image:Tertiary bronchus.JPG\|Cross sectional cut of primary bronchiole		Image:Tertiary bronchus.JPG\|Cross sectional cut of primary bronchiole
	Image:Illu bronchi lungs.jpg\|Bronchi, bronchial tree, and lungs		Image:Illu bronchi lungs.jpg\|Bronchi, bronchial tree, and lungs
	Image:illu_quiz_lung05.jpg \|1. ]<BR>2. ]<BR>3. ]<BR>4. ]<BR>5. ]<BR>6. ]<BR>7. ]		Image:illu_quiz_lung05.jpg \|1. ]<BR>2. ]<BR>3. ]<BR>4. ]<BR>5. Bronchiole<BR>6. ]<BR>7. ]
	</gallery>		</gallery>