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    Realistic human heart model on black background, computer illustration. — Stock Photo
    Realistic human heart model on black background, computer illustration.
    Human heart model on white background, computer illustration. — Stock Photo
    Human heart model on white background, computer illustration.
    Doctor taking blood sample from patient arm. — Stock Photo
    Doctor taking blood sample from patient arm.
    Male anatomy showing vascular system, computer illustration. — Stock Photo
    Male anatomy showing vascular system, computer illustration.
    Mid section of female patient lying on bed in the ward at hospital. She is getting IV therapy and pulse oximetry is measuring her blood. — Stock Photo
    Mid section of female patient lying on bed in the ward at hospital. She is getting IV therapy and pulse oximetry is measuring her blood.
    Bag containing donated human blood, placenta and umbilical cord. — Stock Photo
    Bag containing donated human blood, placenta and umbilical cord.
    Leukaemia blood cells — Stock Photo
    Leukaemia blood cells
    Head louse on white background, digital illustration. — Stock Photo
    Head louse on white background, digital illustration.
    Neutrophil white blood cell and red blood cells, digital illustration. — Stock Photo
    Neutrophil white blood cell and red blood cells, digital illustration.
    Protozoa Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration. — Stock Photo
    Protozoa Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration.
    Thought senior woman sitting with blood pressure machine and a laptop — Stock Photo
    Thought senior woman sitting with blood pressure machine and a laptop
    Digital illustration of trypanosome protozoan parasites causing sleeping sickness transmitted by blood. — Stock Photo
    Digital illustration of trypanosome protozoan parasites causing sleeping sickness transmitted by blood.
    Active platelets in human blood with erythrocytes and leukocytes, computer illustration. — Stock Photo
    Active platelets in human blood with erythrocytes and leukocytes, computer illustration.
    Colored scanning electron micrograph of resting T-lymphocytes from human blood sample. — Stock Photo
    Colored scanning electron micrograph of resting T-lymphocytes from human blood sample.
    Basophil white blood cell and red blood cells, digital illustration. — Stock Photo
    Basophil white blood cell and red blood cells, digital illustration.
    Plasmodium vivax protozoa and red blood cells, digital illustration. — Stock Photo
    Plasmodium vivax protozoa and red blood cells, digital illustration.
    Laboratory technician placing blood bags in machine at blood bank — Stock Photo
    Laboratory technician placing blood bags in machine at blood bank
    Head louse on human hair, digital illustration. — Stock Photo
    Head louse on human hair, digital illustration.
    Close-up of test tube in rack at blood bank — Stock Photo
    Close-up of test tube in rack at blood bank
    Omentum fold of peritoneal membrane — Stock Photo
    Omentum fold of peritoneal membrane
    Cardiovascular system of an adult — Stock Photo
    Cardiovascular system of an adult
    Blood vessels of foot, computer illustration — Stock Photo
    Blood vessels of foot, computer illustration
    Illustration of schistosoma blood fluke flatworm on black background. — Stock Photo
    Illustration of schistosoma blood fluke flatworm on black background.
    Forensics expert examining with flashlight evidence glass of wine at crime scene. — Stock Photo
    Forensics expert examining with flashlight evidence glass of wine at crime scene.
    Wedge of blood orange on knife — Stock Photo
    Wedge of blood orange on knife
    Hand of butcher slicing meat at butchers shop — Stock Photo
    Hand of butcher slicing meat at butchers shop
    Veins in transparent dog body, cropped, anatomical computer illustration. — Stock Photo
    Veins in transparent dog body, cropped, anatomical computer illustration.
    Coloured scanning electron micrograph of activated platelets attached to surgical gauze. — Stock Photo
    Coloured scanning electron micrograph of activated platelets attached to surgical gauze.
    3d illustration of blood cells and Plasmodium parasites causing malaria. — Stock Photo
    3d illustration of blood cells and Plasmodium parasites causing malaria.
    Used surgical swab — Stock Photo
    Used surgical swab
    Red blood cells and protein, digital illustration. — Stock Photo
    Red blood cells and protein, digital illustration.
    Illustration of overweight woman with visible heart on black background. — Stock Photo
    Illustration of overweight woman with visible heart on black background.
    Mid section of butcher chopping red meat at butchers shop — Stock Photo
    Mid section of butcher chopping red meat at butchers shop
    Blood cells and Plasmodium sp. parasites (at schizont stage) causing malaria, computer illustration. — Stock Photo
    Blood cells and Plasmodium sp. parasites (at schizont stage) causing malaria, computer illustration.
    Illustration of heart and close-up of infection bacteria in male body silhouette on black background. — Stock Photo
    Illustration of heart and close-up of infection bacteria in male body silhouette on black background.
    Female abdominal anatomy and internal organs, computer illustration. — Stock Photo
    Female abdominal anatomy and internal organs, computer illustration.
    Babesia parasites inside red blood cell, computer illustration — Stock Photo
    Babesia parasites inside red blood cell, computer illustration
    Male abdominal blood vessels, digital illustration. — Stock Photo
    Male abdominal blood vessels, digital illustration.
    Male upper body anatomy and blood vessels, computer illustration. — Stock Photo
    Male upper body anatomy and blood vessels, computer illustration.
    Snowy owl perching on wood and eating in autumnal meadow. — Stock Photo
    Snowy owl perching on wood and eating in autumnal meadow.
    Head louse on human hair, digital illustration. — Stock Photo
    Head louse on human hair, digital illustration.
    Blood cells in a blood vessel — Stock Photo
    Blood cells in a blood vessel
    Halved blood oranges — Stock Photo
    Halved blood oranges
    3d illustration of cancer cells attacked and killed by lymphocytes. — Stock Photo
    3d illustration of cancer cells attacked and killed by lymphocytes.
    Squeezer on sliced blood orange and glass of juice — Stock Photo
    Squeezer on sliced blood orange and glass of juice
    Hand squeezing blood orange juice — Stock Photo
    Hand squeezing blood orange juice
    Plasmodium ovale protozoan parasites and red blood cell in flow, computer illustration. — Stock Photo
    Plasmodium ovale protozoan parasites and red blood cell in flow, computer illustration.
    Human body model showing male anatomy and blood vessels, digital illustration. — Stock Photo
    Human body model showing male anatomy and blood vessels, digital illustration.
    Plasmodium malariae protozoan inside red blood cells in the ring-form trophozoite stage, computer illustration — Stock Photo
    Plasmodium malariae protozoan inside red blood cells in the ring-form trophozoite stage, computer illustration
    Pain, conceptual computer illustration. — Stock Photo
    Pain, conceptual computer illustration.
    Doctor giving young girl finger prick test. — Stock Photo
    Doctor giving young girl finger prick test.
    3d rendered illustration of colored female heart in body silhouette. — Stock Photo
    3d rendered illustration of colored female heart in body silhouette.
    Red blood cells — Stock Photo
    Red blood cells
    Low angle side view of young female in protective mask browsing smartphone during procedure of blood transfusion in hospital — Stock Photo
    Low angle side view of young female in protective mask browsing smartphone during procedure of blood transfusion in hospital
    Colored illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Colored illustration of cancer cell being attacked by white blood cells.
    Nanobot in bloodstream with red erythrocytes, digital illustration. — Stock Photo
    Nanobot in bloodstream with red erythrocytes, digital illustration.
    Laboratory technicians analyzing blood bags in blood bank — Stock Photo
    Laboratory technicians analyzing blood bags in blood bank
    Realistic human heart and blood vessels on white background, digital illustration. — Stock Photo
    Realistic human heart and blood vessels on white background, digital illustration.
    Anatomy of human skin — Stock Photo
    Anatomy of human skin
    Pulse oximeter, blood oxygen saturation monitor. — Stock Photo
    Pulse oximeter, blood oxygen saturation monitor.