L’aparell circulatori
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L’aparell circulatori Nutrició IV
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L’aparell circulatori
Nutrició IV
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L’aparell circulatori és l’encarregat de transportar els nutrients i O2 fins a les cél.lules i recollir el CO2 i les substàncies de rebuig per la seua expulsió de l’organisme.
Està format per:- els vasos sanguinis- el cor
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1. Els vasos sanguinis
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2. El cor
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• Sístole auricular: contracció de les aurícules, la sang baixa cap als ventricles.
• Sístole ventricular: contracció del ventricles, tancament de les vàlvules auriculoventriculars, la sang ix cap a les arteries.
• Diástole: relaxació de aurícules i ventricles, la sang torna a entrar per les venes cap a les aurícules
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