Trishaarielviz
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how will you describe the sequenceanof the oxygen and carbon and blood flow ?

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Mizuviz
Oxygen first enters the respiratory system through inhalation and then it enters the blood stream to be circulated throughout the body. Carbon dioxide from the tissues enter the blood then to the lungs where it is exhaled..

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oxygen is the air you inhale... CO2 is air you breath out... the blood flow is the flowing of your blood to all parts of your bod.. 

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