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Lungs - Anatomy & Physiology (view source)
Revision as of 14:26, 8 November 2022
, 14:26, 8 November 2022→Webinars
===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.
|dragster = [[Respiratory System Histology Resource (II)|Lung Histology Dragster]]
|dragster = [[Respiratory System Histology Resource (II)|Lung Histology Dragster]]
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|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]]
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==Webinars==
<rss max="10" highlight="none">https://www.thewebinarvet.com/respiratory/webinars/feed</rss>
==References==
==References==
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[[Category:Respiratory System - Anatomy & Physiology]]
[[Category:Respiratory System - Anatomy & Physiology]]
[[Category:A&P Done]]
[[Category:A&P Done]]