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Lungs - Anatomy & Physiology (view source)
Revision as of 14:26, 8 November 2022
, 14:26, 8 November 2022→Webinars
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==Introduction==
==Introduction==
[[Image:Doglungdeflated.jpg|right|thumb|250px|©RVC 2008]]
[[Image:Doglungdeflated.jpg|right|thumb|250px|©RVC 2008]]
===Alveolar Ducts===
===Alveolar Ducts===
These have alveoli which open on all of it's sides, they have no 'walls' as such. Openings to individual alveoli are guarded by [[Muscles - Anatomy & Physiology#Smooth Muscle|smooth muscle]].
These have alveoli which open on all of its sides, they have no 'walls' as such. Openings to individual alveoli are guarded by [[Muscles - Anatomy & Physiology#Smooth Muscle|smooth muscle]].
===Alveolar Sacs===
===Alveolar Sacs===
===Alveoli===
===Alveoli===
Alveoli are minute, polygonal chambers, whose diameter changes with the processes of [[Ventilation - Anatomy & Physiology#Inspiration|inspiration]] and [[Ventilation - Anatomy & Physiology#Expiration|expiration]], and varies by species. The wall of the alveoli is extremely thin, consisting of 2 irregular layers of epithelial sheets, 'sandwiching' a network of capillaries. Thus the ''Blood-Gas Barrier'' is just a single basal lamina - ideal for [[Gas Exchange - Anatomy & Physiology|gaseous exchange]]. The alveolar interstitium is formed from connective tissue fibres and cells, which include collagen fibrils and elastin fibres.
Alveoli are minute, polygonal chambers, whose diameter changes with the processes of [[Ventilation - Anatomy & Physiology#Inspiration|inspiration]] and [[Ventilation - Anatomy & Physiology#Expiration|expiration]], and varies by species. The wall of the alveoli is extremely thin, consisting of 2 irregular layers of epithelial sheets, 'sandwiching' a network of capillaries. Thus the ''Blood-Gas Barrier'' at the thinnest portions is a tripartite structure consisting of the pulmonary capillary endothelium, a common basal lamina and the alveolar epithelium- ideal for [[Gas Exchange - Anatomy & Physiology|gaseous exchange]]. The alveolar interstitium is formed from connective tissue fibres and cells, which include collagen fibrils and elastin fibres.
==Function==
==Function==
==Histology==
==Histology==
'''Pneumocytes''' are a type of epithelial cells that lines the alveoli.
*the '''Type I''' pneumocytes are simple squamous with a flattened central nucleus that protrudes into the alveolar lume
*the '''Type II''' pneumocytes are round to pyramidal-shaped cells that are found among the type I pneumocytes. The type II pneumocytes have a larger centrally placed nucleus with a prominent nucleolus and a slightly vacuolated, foamy, basophilic cytoplasm. The nucleus of these cells also has a nucleolus.
==Links==
==Links==
Click here for more information on [[Lungs - Pathology|pathology of the lungs]].
Click here for more information on [[:Category:Lungs - Pathology|pathology of the lungs]].
{{Template:Learning
|powerpoints = [[Respiratory System Histology resource|Respiratory system histology tutorial with questions and answers]]
|dragster = [[Respiratory System Histology Resource (II)|Lung Histology Dragster]]
|videos = [[Video: Piglet Anatomy|Piglet Anatomy]]<br>[[Video: African Gray Parrot Radiograph|African Gray Parrot Radiograph]]<br>[[Video: Equine left-sided abdominal and thoracic topography dissection|Equine left-sided abdominal and thoracic topography dissection]]<br>[[Video: Equine thoracic cavity dissection|Equine thoracic cavity dissection]]<br>[[Video: Ovine right-sided abdominal and thoracic dissection|Ovine right-sided abdominal and thoracic dissection]]
|OVAM = [http://www.um.es/anatvet/interactividad/ingles/avispi/practicas/practica1.htm Dissection plans of the canine thoracic cavity]<br>[http://www.onlineveterinaryanatomy.net/sites/default/files/original_media/document/asset_9296_Dried%20dog%20lung%20PDF.pdf Labelled dried dog lung]<br>[http://www.onlineveterinaryanatomy.net/content/respiration-histology-images-lung-0 Histology - Lung 1]<br>[http://www.onlineveterinaryanatomy.net/content/respiration-histology-images-lung Histology - Lung 2]<br>[http://www.onlineveterinaryanatomy.net/content/ovine-lung-histology-0 Histology - Ovine Lung 1]<br>[http://www.onlineveterinaryanatomy.net/content/ovine-lung-histology Histology - Ovine Lung 2]<br>[http://www.onlineveterinaryanatomy.net/content/fallow-deer-lungs-0 Cast of Fallow deer lungs]<br>[http://www.onlineveterinaryanatomy.net/content/interactive-pig-anatomy-lungs-0 Interactive Pig Anatomy - Lungs]
}}
==Webinars==
<rss max="10" highlight="none">https://www.thewebinarvet.com/respiratory/webinars/feed</rss>
==References==
==References==
{{citation|initiallast = Dyce|initialfirst = K.M|2last = Sack|2first = W.O|finallast = Wensing|finalfirst = C.J.G|year = 2002|title = Textbook of Veterinary Anatomy|ed =3rd|city = Philadelphia|pub = Saunders}}
{{citation|initiallast = Dyce|initialfirst = K.M|2last = Sack|2first = W.O|finallast = Wensing|finalfirst = C.J.G|year = 2002|title = Textbook of Veterinary Anatomy|ed =3rd|city = Philadelphia|pub = Saunders}}
{{review}}
[[Category:Respiratory System - Anatomy & Physiology]]
[[Category:Respiratory System - Anatomy & Physiology]]
[[Category:A&P Done]]
[[Category:A&P Done]]