a haem protein responsible for the red colour of blood and for the transport of oxygen to the tissues; occurring in reduced form (reduced haemoglobin) in venous blood, and in combination with oxygen (oxyhaemoglobin) in arterial blood.
a haem protein responsible for the red colour of blood and for the transport of oxygen to the tissues; occurring in reduced form (reduced haemoglobin) in venous blood, and in combination with oxygen (oxyhaemoglobin) in arterial blood.