Basic mechanism Two forms of the gases: physical dissolution and chemical combination Most of o, and co, in the blood is transported in chemical combination Only the gas in physical dissolution express PP and diffuse to a place with low PP Dynamic balance between the two forms Physical dissolution ppt Chemical combination PP2 Two forms of the gases: physical dissolution and chemical combination. Most of O2 and CO2 in the blood is transported in chemical combination Only the gas in physical dissolution express PP and diffuse to a place with low PP. Dynamic balance between the two forms: Physical dissolution Chemical combination PP PP Basic Mechanism