fig.1. red blood cells of man 7 to 8 thousandths of a millimeter or rbcs, vintage engraving

anatomy ancient antique art artwork biology black blood bloodcell cell circulation corpuscles disease drawing engraved engraving erythrocytes erythroid etching experiment haematids health healthcare healthy hemoglobin human illustration magnification man medical microbiology old organic oxygen patient picture rbc red research science scientific system vector vintage white