Lungs are made up of air-filled sacs, th...

Lungs are made up of air-filled sacs, the alveoli . They do not collapse even after forceful expiration because of

Residual volume

Inspiratory Reserve Volume + Residual Volume

Tidal volume

Expiratory Reserve Volume

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Fill in the blanks : (i) During normal quiet breathing on an average, approximately "........." ml of air is inspired or expired by adult human male in each "........." ml of air enters the lung alveoli for the exchange of gases. The remaining fills the respiratory passage and is termed "........." (iii) the amount of air which one can inhale with maximum effort and also exhale with maximum effort is termed as "........." It is about "........." in normal adult person. (iv) The air that always remains in the lungs even after forceful expiration is called "........." It is about "........." (v ) The ratio of the volume of CO_(2) produced to the volume of O_(2) used in a unit time is called "........." .For fats it is "........."

Large volume of air that a person can expire after a forceful inspiration is called

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