Another respiratory pigment in vertebrates is MYOGLOBIN. It contains a single haem group rather than the four found in the HAEMOGLOBIN. Myoglobin has a greater affinity for oxygen than haemoglobin. Myoglobin occurs in the muscles of all vertebrates where it acts as a store of oxygen. In periods of extreme exertion, when the supply of oxygen by the blood is insufficient to keep pace with the demand, the oxygen stored in the muscles is used instead.
MYOGLOBIN HAS A GREATER AFFINITY FOR OXYGEN MEANS THAT IT COMBINES WITH OXYGEN MORE READILY THAN HAEMOGLOBIN.
MYOGLOBIN HAS A GREATER AFFINITY FOR OXYGEN MEANS THAT IT COMBINES WITH OXYGEN MORE READILY THAN HAEMOGLOBIN.
