What cells are there in the human blood?

Human blood is made up of fluid (plasma) and various blood cells. Most of the red blood cells in the blood. They are called red blood cells and have the function of making bonds of oxygen, transporting molecules to the desired cells, and replacing oxygen with carbon dioxide. They have this property due to the fact that they consist of hemoglobin. Hemoglobin is composed of heme and globin. Heme occupies only 4% of the hemoglobin composition, but it is she who is responsible for creating a bond with oxygen. This property has heme due to the iron in its composition.