What is a accurate description of oxygen diffusing from the lungs into blood

Every cell in the body of living organisms requires oxygen for its survival. Hemoglobin is a type of blood cell which is responsible for the transportation of oxygen and carbondioxide in the body. Hemoglobin transport carbondioxide which is produced as waste material, from the cell to the lungs and oxygen is loaded in the hemoglobin cell which take this oxygen to all cells.