Alveolar duct: Difference between revisions

Alveolar duct
Alveolar duct
	Detailed drawing of the alveoli from Gray's Anatomy, 1918 - Schematic longitudinal section of a primary lobule of the lung (anatomical unit);; r. b respiratory bronchiole;; al. d alveolar duct; at atria;; a. s alveolar sac;; 'a' alveolus or air cell;; p. a.: pulmonary artery;; p. v pulmonary vein;; l lymphatic;; l. n lymph node.
	Part of a secondary lobule from the depth of a human lung, showing parts of several primary lobules.; 1, bronchiole;; 2, respiratory bronchiole;; 3, alveolar duct;; 4, atria;; 5, alveolar sac;; 6, alveolus or air cell:; m, smooth muscle;; a, branch pulmonary artery;; v, branch pulmonary vein;; s, septum between secondary lobules.
Identifiers
TH	H3.05.02.0.00022
FMA	7342
	Anatomical terminology [edit on Wikidata]

Browse history interactively

← Previous edit Next edit →

Content deleted Content added

VisualWikitext

Inline

Revision as of 08:15, 10 June 2012

Alveolar ducts are tiny ducts connect the respiratory bronchioles to alveolar sacs, each of which contain a bunch of alveoli (the balls). They are tiny end ducts of the branching airways that fill the lungs. Each lung holds approximately 1.5 to 2 million of them. The tubules divide into two or three alveolar sacs at the distal end. They are formed from the confluence openings of several alveoli. Distal terminations of alveolar ducts are atria which then end in alveolar sacs.

In human anatomy, respiratory bronchioles exists proximal to the alveolar ducts. The epithelial lining consists of smooth muscle knobs covered by nonciliated, simple cuboidal cells. The smooth muscle constricts under parasympathetic innervation and relax under sympathetic innervation.

Additional images

Bronchi, bronchial tree, and lungs

External links

Template:EMedicineDictionary
Anatomy Atlases – Microscopic Anatomy, plate 11.229 - "Alviolar Duct and Alveolar Sacs"
Histology image: 13607loa – Histology Learning System at Boston University - "Respiratory System: lung (sheep), alveolar duct "
Anatomy photo: respiratory/lung/lung7/lung3 - Comparative Organology at University of California, Davis - "Mammal, lung (EM, Medium)"

This respiratory system article is a stub. You can help Wikipedia by expanding it.

@@ Line 15: / Line 15: @@
   Code         = {{TerminologiaHistologica|3|05|02.0.00022}} |
 }}
-'''Alveolar ducts''' are tiny ducts connect the [[respiratory bronchioles]] to [[alveoli]]. They are tiny end ducts of the branching airways that fill the [[lung]]s. Each lung holds approximately 1.5 to 2 million of them. The tubules divide into two or three [[alveolar sac]]s at the [[distal]] end. They are formed from the confluence openings of several alveoli. Distal terminations of alveolar ducts are atria which then end in alveolar sacs.
+'''Alveolar ducts''' are tiny ducts connect the [[respiratory bronchioles]] to [[alveolar sacs]], each of which contain a bunch of [[alveoli]] (the balls). They are tiny end ducts of the branching airways that fill the [[lung]]s. Each lung holds approximately 1.5 to 2 million of them. The tubules divide into two or three [[alveolar sac]]s at the [[distal]] end. They are formed from the confluence openings of several alveoli. Distal terminations of alveolar ducts are atria which then end in alveolar sacs.
 In human anatomy, respiratory [[bronchioles]] exists proximal to the alveolar ducts. The epithelial lining consists of smooth muscle knobs covered by nonciliated, simple cuboidal cells. The smooth muscle constricts under parasympathetic innervation and relax under sympathetic innervation.