<prompt> All decrease CO2 absorption in circuit exceptResistance in circuitFlowDead SpaceTidal Volume  <response>: A i.e. Resistance in circuit 3 times of minute volumeQ volumeQ v:shapes_x0000_s1027CO2 absorbers increase circuit resistanceQ. Granule size is a compromise between high resistance high absorptive surface area of small granules and lower resistance to gas lesser absorptive surface area of larger granules dt channelingQ Flow rate tidal volume should not exceed the air space between absorbent granules; this will decrease CO2 absorption.Q The pa of tidal volume that does not undergo alveolar ventilation is referred as dead space; so any increase in dead space decreases CO2 absorption. 