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Which gas constitutes approximately 21% of the air we breathe?
Which gas constitutes approximately 21% of the air we breathe?
Which system is most directly involved in the delivery of oxygen to body tissue?
Which system is most directly involved in the delivery of oxygen to body tissue?
What is the waste product of cellular respiration?
What is the waste product of cellular respiration?
What is the process of gaseous exchange between the individual and the environment called?
What is the process of gaseous exchange between the individual and the environment called?
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Which process refers to the movement of gases in and out of the lungs?
Which process refers to the movement of gases in and out of the lungs?
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