As a molecule of oxygen passes from pulmonary alveolar air into the blood it passes through the layers of the respiratory membrane in what order

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wha is what i will use to get my free points

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.