"Ok, so there's alot of information covered above! We've been buzzing around this subject since back in BIO-100 when we talked about carrier proteins and Mrs. Gess did the football player tucking the ball into a safe hold in order to get it up the field. In this case, the football player is hemoglobin and oxygen is the ball. The only difference is that hemoglobin is like a multi-handed player because it can actually carry up to four oxygen's at a time!"