3d erythrocyte or red blood cell medicine transparent pgn. realistic picture of hemoglobin for hematology, microbiology

erythrocyte red blood cell medicine isolated white background realistic hemoglobin hematology microbiology health human microscopic concept hematologic injury vein icon macro artery aid corpuscle anemia plasma emergency medic lab vascular life medical body disease hospital biology anatomy cartoon round rendering abstract transparent png healthcare graphic design pgn pgn