What is the difference between atria and ventricles?

osso coração é dividido em 4 Câmaras(.Átrios e ventrículos )  2 ÁTRIOS DIREITO  E 2 VENTRÍCULOS ESQUERDO.Os átrios recebe sangue rico em oxigênio pobre em gás carbônio,os ventrículos espulsam sangue rico em gás garbônico e pobre em oxigênio (TROCAS GASOSAS NO PULMÃO  é a  HEMATOSE.

The atria stand for the upper chambers of the heart, while the ventricles are the lower chambers. Atria act as receptors of deoxygenated blood, while ventricles receive blood from the left atria and force it into the aorta.

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the denominator has a very specific role.