Choose the correct statement from the following options (a)The lungs a

1.	Choose the correct statement from the following options (a)The lungs allow only CO2 to enter the respiratory system (b)The nostrils filter the air and allow only O2 to pass through them. (c)The percentage of O2 in expired air is 16% (d)The percentage of CO2 in expired air is 4%
Answer» Choose the correct statement from the following options (a)The lungs allow only $C O_{2}$ to enter the respiratory system (b)The nostrils filter the air and allow only $O_{2}$ to pass through them. (c)The percentage of $O_{2}$ in expired air is 16% (d)The percentage of $C O_{2}$ in expired air is 4%

Choose the correct statement from the following options (a)The lungs allow only CO2 to enter the respiratory system (b)The nostrils filter the air and allow only O2 to pass through them. (c)The percentage of O2 in expired air is 16% (d)The percentage of CO2 in expired air is 4%

Answer»

Choose the correct statement from the following options

(a)The lungs allow only $C O_{2}$ to enter the respiratory system
(b)The nostrils filter the air and allow only $O_{2}$ to pass through them.
(c)The percentage of $O_{2}$ in expired air is 16%
(d)The percentage of $C O_{2}$ in expired air is 4%

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Choose the correct statement from the following options (a)The lungs allow only CO2 to enter the respiratory system (b)The nostrils filter the air and allow only O2 to pass through them. (c)The percentage of O2 in expired air is 16% (d)The percentage of CO2 in expired air is 4%

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