Class 11 NEET Biology Breathing and Exchange of Gases

(c) : The transport of O2 and CO2 occurs with the help of RBCs and blood plasma. 97% of O2 is transported by RBCs and 3% of O2 is carried by plasma. About 7% of CO2 is transported in plasma and rest by RBCs(23%) by binding with Hb and 70% reacts with water to form carbonic acid in RBCs.