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Summary physiology of the respiratory system

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summary of the physiotherapy course, first year of the bachelor's degree in physiotherapy.

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August 22, 2024
Number of pages
20
Written in
2023/2024
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Physio : appareil respiratoire




1) Généralités



a. Respiration interne



Production d’ATP à partir d’O2 et nutriments



b. Respiration externe



Échange entre le sang et l’environnmement, nécessite :



 Ventilation
 Perfusion : débit sanguin
 Membrane alvéolo-capillaire



2) Anatomie



a. Voies aériennes

,  Muqueuse respiratoire :

o Épithélium respiratoir

Pseudostratifié, composé de cellules cilliées et cellules à mucus

o Protection contre les poussières et microbes



 Cavités nasales

o Vibrisses
o Cornets nasaux qui forment des méats => filtrer réchauffer, humidifier air inspiré
o Sinus frontaux, maxillaires, ethmoides et sphénoides => caisse de résonnance pour la
voix
o Conduit lacrymo-nasal



 Pharynx

Carrefour aéro-digestif

o Rhinopharynx
o Oropharynx
o Laryngopharynx

,  Trachée



o En avant de l’œsophage / division en 2 bronches dont la droite est plus verticale




o Partie conductrice : bronches principales, lobaires, segmentaires, bronchioles et
bronchioles terminales

La proportion de cartilage diminue et celle de muscle lisse augmente



o Partie respiratoire : bronchioles respiratoires, canaux alvéolaires, alvéoles



 Muscles : bronchoconstriction (système parasympathique)




carcinome bronchique : cancer des bronches (communément appelé cancer des poumons



o Asthme

Dyspnée à cause de la contraction musculaire, œdème de la muqueuse ou sécrétion mucus

Cause : réaction allergique, infection, facteur psy
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