The right atrium is large and covered by a thin membrane. Above it is the superior vena cava and below it is the inferior vena cava. It carries CO2-rich blood to the right ventricle through the tricuspid valve.
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The right atrium is large and covered by a thin membrane. Above it is the superior vena cava and below it is the inferior vena cava. It carries CO2-rich blood to the right ventricle through the tricuspid valve.