imagine you are an oxygen molecule that has just been breathed in. describe the rout u will take to get to the blood
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You will first go down through the nose down the respiratory tract and will then go to the lungs. In the lungs you will go further towards the alveoli where the the layer is so thin that the the molecule of oxygen will diffuse into the blood capillaries where it reacts with the hemoglobin to form oxy-hemoglobin and will continue its journey inside the body
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