F8v: Describe the O2 & CO2 stores in the body

CO2 Stores

  • ~120L of CO2 in the body
CO2 Stores
  • Large storage amount
  • ∴levels don’t fluctuate rapidly like they do with ∆ SpO2 / PO2

O2 Stores

1) Lungs: FRC = 30mL/kg

∴x FiO2 = mL of O2

2) Blood

    • Hb
    • Dissolved

3) Tissues

    • Dissolved
    • Myoglobin
  • O2 stores ~1500mL
  • Basal O2 consumption 250mL/min
  • ∴6 min of stores