'In a single red blood cell, there are more than 300 million molecules of this iron-rich pigment'
hemoglobin
THE BODY HUMAN: In a single red blood cell, there are more than 300 million molecules of this iron-rich pigment
In a single red blood cell, there are more than 300 million molecules of this iron-rich pigment
In a single red blood cell, there are more than 300 million molecules of this iron-rich pigment
THE BODY HUMAN
hemoglobin
THE BODY HUMAN