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    Cardiovascular system of an adult — Stock Photo
    Cardiovascular system of an adult
    Heart anatomy in male thorax, computer illustration. — Stock Photo
    Heart anatomy in male thorax, computer illustration.
    Illustration of overweight woman with visible heart on black background. — Stock Photo
    Illustration of overweight woman with visible heart on black background.
    Circulatory and nervous systems — Stock Photo
    Circulatory and nervous systems
    Zombie hand coming out of ground on dark background — Stock Photo
    Zombie hand coming out of ground on dark background
    Cancer cells with blood vessel formation — Stock Photo
    Cancer cells with blood vessel formation
    Close-up of meat slices in black tray — Stock Photo
    Close-up of meat slices in black tray
    White blood cell structure — Stock Photo
    White blood cell structure
    Hypodermic needle and blood, computer illustration — Stock Photo
    Hypodermic needle and blood, computer illustration
    Human blood cells — Stock Photo
    Human blood cells
    Measuring oxygen saturation in blood with pulse oximeter. — Stock Photo
    Measuring oxygen saturation in blood with pulse oximeter.
    Chinstrap penguin with blood stained chest — Stock Photo
    Chinstrap penguin with blood stained chest
    Colored illustration showing abundant lymphoblast cells in human bone marrow smear in acute lymphoblastic leukaemia. — Stock Photo
    Colored illustration showing abundant lymphoblast cells in human bone marrow smear in acute lymphoblastic leukaemia.
    Paramedics putting injured girl onto a backboard on street — Stock Photo
    Paramedics putting injured girl onto a backboard on street
    Illustration of tick parasite crawling on human skin surface. — Stock Photo
    Illustration of tick parasite crawling on human skin surface.
    Visual render of Human skin anatomy — Stock Photo
    Visual render of Human skin anatomy
    Blood orange and juice on dark background — Stock Photo
    Blood orange and juice on dark background
    Erythrocytes or red blood cells — Stock Photo
    Erythrocytes or red blood cells
    Human heart model on blue background, computer illustration. — Stock Photo
    Human heart model on blue background, computer illustration.
    Laboratory technician holding test tubes in blood bank — Stock Photo
    Laboratory technician holding test tubes in blood bank
    Low angle view of anatomical model showing female anatomy and internal organs, computer illustration. — Stock Photo
    Low angle view of anatomical model showing female anatomy and internal organs, computer illustration.
    Virus particles in blood stream, digital illustration. — Stock Photo
    Virus particles in blood stream, digital illustration.
    Illustration of red human blood cells on black background. — Stock Photo
    Illustration of red human blood cells on black background.
    Cardiovascular system showing veins and arteries — Stock Photo
    Cardiovascular system showing veins and arteries
    Skeletal and cardiovascular systems of adult — Stock Photo
    Skeletal and cardiovascular systems of adult
    Western Blackneck Garter Snake, — Stock Photo
    Western Blackneck Garter Snake,
    Illustration of heart in transparent male silhouette. — Stock Photo
    Illustration of heart in transparent male silhouette.
    Blood clot, computer illustration — Stock Photo
    Blood clot, computer illustration
    HIV virus particles — Stock Photo
    HIV virus particles
    Common Jackal (Canis Aureus) and Black-backed Jackal (Canis mesomelas) attacking and killing a Thomsons Gazelle (Gazella thomsoni) for food; Tanzania — Stock Photo
    Common Jackal (Canis Aureus) and Black-backed Jackal (Canis mesomelas) attacking and killing a Thomsons Gazelle (Gazella thomsoni) for food; Tanzania
    Cropped shot of physician using stethoscope on patient's hand — Stock Photo
    Cropped shot of physician using stethoscope on patient's hand
    Male head and neck anatomy and blood vessels, computer illustration. — Stock Photo
    Male head and neck anatomy and blood vessels, computer illustration.
    Syringe with spilled blood on white background. — Stock Photo
    Syringe with spilled blood on white background.
    Human cardiovascular system — Stock Photo
    Human cardiovascular system
    Eosinophil white blood cell, digital illustration. — Stock Photo
    Eosinophil white blood cell, digital illustration.
    3d illustration of red blood cell erythrocyte, white blood cell leukocyte and platelet thrombocyte. — Stock Photo
    3d illustration of red blood cell erythrocyte, white blood cell leukocyte and platelet thrombocyte.
    Top view of different types of sliced exotic fruits with whole oranges and leaves — Stock Photo
    Top view of different types of sliced exotic fruits with whole oranges and leaves
    Female thorax anatomy with skeleton and internal organs, computer illustration. — Stock Photo
    Female thorax anatomy with skeleton and internal organs, computer illustration.
    Illustration of human heart anatomy on grey background. — Stock Photo
    Illustration of human heart anatomy on grey background.
    Woman taking her own blood sugar — Stock Photo
    Woman taking her own blood sugar
    3d illustration of white blood cells leukocytes secreting antibodies to destroy allergen in human body. — Stock Photo
    3d illustration of white blood cells leukocytes secreting antibodies to destroy allergen in human body.
    Erythrocytes red blood cells in human blood vessel, digital illustration. — Stock Photo
    Erythrocytes red blood cells in human blood vessel, digital illustration.
    Mucosa of the trachea — Stock Photo
    Mucosa of the trachea
    Digital illustration showing destruction of lymphoblast cells, acute lymphoblastic leukaemia treatment concept. — Stock Photo
    Digital illustration showing destruction of lymphoblast cells, acute lymphoblastic leukaemia treatment concept.
    Close-up of pipetting sample into microcentrifuge tubes. — Stock Photo
    Close-up of pipetting sample into microcentrifuge tubes.
    Blood clot formation — Stock Photo
    Blood clot formation
    Nurse with Cerebral Palsy taking a patient's blood pressure in a clinic — Stock Photo
    Nurse with Cerebral Palsy taking a patient's blood pressure in a clinic
    Arteries in transparent dog body, anatomical computer illustration. — Stock Photo
    Arteries in transparent dog body, anatomical computer 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
    Diseased blood cells with bacteria, computer illustration. — Stock Photo
    Diseased blood cells with bacteria, computer illustration.
    Digital illustration of abnormal blood cells infected by hairy cell leukemia. — Stock Photo
    Digital illustration of abnormal blood cells infected by hairy cell leukemia.
    Paramedics examining injured girl on street — Stock Photo
    Paramedics examining injured girl on street
    Male upper body anatomy and internal organs, computer illustration. — Stock Photo
    Male upper body anatomy and internal organs, computer illustration.
    Blood oranges, whole and halved, on a grey concrete surface — Stock Photo
    Blood oranges, whole and halved, on a grey concrete surface
    West Nile virus particles — Stock Photo
    West Nile virus particles
    Close-up of vital signs of patient on monitor in intensive care ward. — Stock Photo
    Close-up of vital signs of patient on monitor in intensive care ward.
    3d illustrations of the human heart with lines demonstrating blood flow. — Stock Photo
    3d illustrations of the human heart with lines demonstrating blood flow.
    Snake red blood cells. Coloured scanning electron micrograph (SEM) of whole and fractured red blood cells (erythrocytes, red) in a small blood vessel of a snake — Stock Photo
    Snake red blood cells. Coloured scanning electron micrograph (SEM) of whole and fractured red blood cells (erythrocytes, red) in a small blood vessel of a snake
    Closeup set of medical flasks with blood samples arranged in container in modern hospital laboratory — Stock Photo
    Closeup set of medical flasks with blood samples arranged in container in modern hospital laboratory
    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