A 12 year old girl is brought to GP for a follow up examination because of aplastic anemia. Physical exam shows no abnormalities except for pallor. Lab studies show HB of 6.0 and hematocrti of 24 %. Three months ago her HB was 6.2 abd hematocrit was 25 %. Compared with a normal healthy individual what would most likely be decresed in this patient during resting conditions?

The main function of the respiratory system is gas exchange (O2 and CO2). Ventilation is the movement of air through the respiratory tract into (inspiration) and out of (expiration) the respiratory zone (lungs).