Hemoglobin may be defined as red color pigment present in the red blood cells. The main function of hemoglobin is the transport of oxygen molecules in the body.
Various factors can affect the binding of oxygen with hemoglobin. The higher the partial pressure of oxygen, more oxygen will bind to the hemoglobin and transport faster in the blood. Low partial pressure decreases the binding affinity of oxygen with hemoglobin. All other factors mentioned in the questions are correct.
