two generations of red cells ( embryonic and definitive ) , different types of haemoglobins , and special organic phosphates involved in the control of haemoglobin oxygenation ( 2:3-bisphosphoglycerate , bpg , and inositol-5-phosphate , ip5 ) , have been found progressively during development of the chick .
C0014792
red cells
C0019046
haemoglobins