Stock Photo - A scanning electron microsope´s view of blood cells. The round non_nucleated doughnut shaped cells are red blood cells, which transport oxygen and remove carbon dioxide. The spherical cells with a rough texture are white blood cells, which produce antibodies and fight infection. The smallest peices are platelets, tiny cells needed for blood clotting. Photo by Bruce Wetzel and Harry Schaefer.

Stock Photo: A scanning electron microsope's view of blood cells. The round non-nucleated doughnut shaped cells are red blood cells, which transport oxygen and remove carbon.