Biology
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Which of the following best indicates the sequence of oxygen flow though the parts of the respiratory and circulatory systems? a. lung capillaries, trachea, veins, alveoli b. veins, trachea, lung capillaries, alveoli c. trachea, alveoli, lung capillaries, arteries d. trachea, arteries, alveoli, lung capillaries PLEASE HELPP!!

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(1) Answers
han1

b. veins, trachea, lung capillaries, alveoli

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