This explanation provides essential information on the role of dissolved oxygen (O2) in the blood and the principles that govern its behavior.
1. **Oxygen in Blood**: Oxygen exists in two forms in the blood – as dissolved O2 that is free in solution and as O2 bound to hemoglobin. The dissolved O2 constitutes about 2% of the total oxygen content in the blood.
2. **Partial Pressure and Dissolved O2**: Only the dissolved O2 contributes to the