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Tema 7: Sistema respiratori

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TEMA 7: FISIOLOGIA DE LA RESPIRACIÓ




1. ANATOMIA FISIOLOGICA VIES AÈRIES/PULMONS




1.1 Intercanvi de gassos

, 1.2 Tipus cel·lulars


Cèl·lules de les vies respiratòries

Seroses i Encarregades de segregar als conductes respiratoris un fluid
secretores mucós amb molts polisacàrids que intentan atrapar les
partícules en suspense que entren en l’aire.

Clares o de clara Segregan un agent tensioartiol que disminueix la tensió
superficial del liquid mucós.

Cèl·lules ciliades Empenyen la mucusitat cap amunt de les vies respiratòries amb
el seu moviment de cilis.

Cèl·lules dels alvèols (a vegades trobem macròfags alveolars)

Pneumòcits tipus 1 90% de les cèl·lules alveolars, són cèl·lules epitelials molt
planes.

Pneumòcits tipus 2 10% restant. Són cèl·lules epitelials cúbiques i més grans.
- Segreguen el surfactant dins l’alvèol, líquid que conté
substàncies amb agent tensioactiu per disminuir la tensió
superficial de la película aquosa dels alvèols. .
- Generen nous pneumòcits de tipus 1 si es necessari.

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Uploaded on
June 25, 2021
Number of pages
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2020/2021
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Octavi martí sistac
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