File:Respiratory histology 03.jpg: Difference between revisions

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Respiratory Alveoli

Alveous cartoon

Structure of the functional unit of the lung, note the capillary embedded in wall. Compare the structure with alveoli cartoon.

Alveolar type I cells

small alveolar cells or type I pneumocytes
are extremely flattened (the cell may be as thin as 0.05 µm) and branched
form the bulk (95%) of the surface of the alveolar walls.
The shape of the cells is very complex, and they may actually form part of the epithelium on both faces of the alveolar wall.
multiple cytoplasmic plates and relatively devoid of organelles
- plates represent the gas exchange surface in the alveolus.

Alveolar type II cells

large alveolar cells or type II pneumocytes
about as many type II cells as type I cells (cell shape accounts for small contribution to alveolar area).
irregularly (sometimes cuboidal) shaped.
form small bulges on the alveolar walls.
contain are large number of granules called cytosomes (or multilamellar bodies)
- consist of precursors to pulmonary surfactant (mixture of phospholipids that keep surface tension in the alveoli low).
can act as a progenitor cell for both type I and type II cells.

Alveolar Macrophage

dust cell
monocyte-derived immune system cell
removes debris and microorganisms from the alveoli.
- subset of pulmonary macrophages.

Links: Histology | Histology Stains | Blue Histology images copyright Lutz Slomianka 1998-2009. The literary and artistic works on the original Blue Histology website may be reproduced, adapted, published and distributed for non-commercial purposes. See also the page Histology Stains.

Cite this page: Hill, M.A. (2024, May 18) Embryology Respiratory histology 03.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Respiratory_histology_03.jpg

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	Date/Time	Dimensions	User	Comment
current	19:45, 27 February 2012	450 × 600 (29 KB)	Z8600021 (talk \| contribs)
	15:48, 2 March 2011	300 × 400 (21 KB)	S8600021 (talk \| contribs)
	15:47, 2 March 2011	300 × 400 (27 KB)	S8600021 (talk \| contribs)	==Respiratory Alveoli== Respiratory histology 03.jpg Original file name: Lun40he.jpg {{Template:Blue Histology}} Category:Respiratory

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@@ Line 1: / Line 1: @@
 ==Respiratory Alveoli==
+[[File:Alveolar-sac-01.jpg|thumb|300px|Alveous cartoon]]
+{{HE}}
+Structure of the functional unit of the lung, note the capillary embedded in wall. Compare the structure with [[:File:Alveolar-sac-01.jpg|alveoli cartoon]].
+===Alveolar type I cells===
+* small alveolar cells or type I pneumocytes
+* are extremely flattened (the cell may be as thin as 0.05 µm) and branched
+* form the bulk (95%) of the surface of the alveolar walls.
+* The shape of the cells is very complex, and they may actually form part of the epithelium on both faces of the alveolar wall.
+* multiple '''cytoplasmic plates''' and relatively devoid of organelles
+** plates represent the gas exchange surface in the alveolus.
-Respiratory histology 03.jpg
+===Alveolar type II cells===
+* large alveolar cells or type II pneumocytes
+* about as many type II cells as type I cells (cell shape accounts for small contribution to alveolar area).
+* irregularly (sometimes cuboidal) shaped.
+* form small bulges on the alveolar walls.
+* contain are large number of granules called cytosomes (or multilamellar bodies)
+** consist of precursors to pulmonary surfactant (mixture of phospholipids that keep surface tension in the alveoli low).
+* can act as a progenitor cell for both type I and type II cells.
-Original file name: Lun40he.jpg
+===Alveolar Macrophage===
+* dust cell
+* monocyte-derived immune system cell
+* removes debris and microorganisms from the alveoli.
+** subset of pulmonary macrophages.
-{{Template:Blue Histology}}
+{{Respiratory Histology}}
+{{Blue Histology}}
 [[Category:Respiratory]]