- hemoglobin, haemoglobin, Hb - a hemoprotein composed of globin and heme that gives red blood cells their characteristic color; function primarily to transport oxygen from the lungs to the body tissues; "fish have simpler hemoglobin than mammals"
--1 is a kind of hemoprotein, haemoprotein
--1 is a substance of red blood cell, RBC, erythrocyte
--1 has substances:
--1 has particulars: oxyhemoglobin, oxyhaemoglobinheme, haem, hematin, haemitin, protoheme; globin, hematohiston, haematohiston