anatomy 22 - 25.10 Alveolar type 1 cell Simple squamous...

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- 25.10 o Alveolar type 1 cell Simple squamous epithelial cell Very thin Diffusion Where oxygen comes into alveolus o Wall between adjacent alveoli Within wall are capillaries Capillaries surrounded by loose connective tissue (because it has space to let capillaries travel through) Wall of capillaries: simple squamous o Relationship between alveolus wall and capillary wall Where the join is basement membrane The passage of a molecule of oxygen from the atmosphere (lumen of alveolus) into the capillary is through two simple squamous cells o Type 2 alveolar cells Produce surfactant A watery type of fluid that covers the luminal surface of each alveolus There to reduce surface tension o Proverbial pitbulls: as you are running for your life you are inhaling and exhaling very quickly, as you forcibly exhale, the opposing walls of alveoli can come in contact with each other, if they were dry, they would stick, and you have no way to unstuck them- therefore those would be unusable forever, decreasing your
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This note was uploaded on 03/18/2009 for the course BS 240 taught by Professor Zink during the Spring '09 term at University of the Sciences in Philadelphia.

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anatomy 22 - 25.10 Alveolar type 1 cell Simple squamous...

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