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    Red blood cells and white blood cells, digital illustration. — Stock Photo
    Red blood cells and white blood cells, digital illustration.
    Coloured coronary angiogram (X-ray) of a 59 year old patient with severe stenosis (narrowing) in the left anterior interventricular coronary artery (running down left) and the left circumflex artery (centre). — Stock Photo
    Coloured coronary angiogram (X-ray) of a 59 year old patient with severe stenosis (narrowing) in the left anterior interventricular coronary artery (running down left) and the left circumflex artery (centre).
    Schematic representation of human vein structure — Stock Photo
    Schematic representation of human vein structure
    Atherosclerosis and narrowed artery — Stock Photo
    Atherosclerosis and narrowed artery
    Virus particles in blood stream, digital illustration. — Stock Photo
    Virus particles in blood stream, digital illustration.
    Bloodstream showing red blood cells — Stock Photo
    Bloodstream showing red blood cells
    Skeletal and cardiovascular systems — Stock Photo
    Skeletal and cardiovascular systems
    Cardiovascular system with emphasis on heart — Stock Photo
    Cardiovascular system with emphasis on heart
    Red blood cells, digital illustration. — Stock Photo
    Red blood cells, digital illustration.
    Human veins anatomy — Stock Photo
    Human veins anatomy
    Human vein showing tissue stratification — Stock Photo
    Human vein showing tissue stratification
    Cross-section of human artery — Stock Photo
    Cross-section of human artery
    Human brain anatomy — Stock Photo
    Human brain anatomy
    Nanomachines working on red blood cells, digital illustration. — Stock Photo
    Nanomachines working on red blood cells, digital illustration.
    Male anatomy with tissue and systems — Stock Photo
    Male anatomy with tissue and systems
    Human heart anatomy — Stock Photo
    Human heart anatomy
    Coloured scanning electron micrograph of human red blood cells, white blood cells and platelets. — Stock Photo
    Coloured scanning electron micrograph of human red blood cells, white blood cells and platelets.
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration. — Stock Photo
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration.
    Chest, neck and head arteries — Stock Photo
    Chest, neck and head arteries
    Human cardiovascular system — Stock Photo
    Human cardiovascular system
    Red blood cells — Stock Photo
    Red blood cells
    Skeletal and cardiovascular systems of adult — Stock Photo
    Skeletal and cardiovascular systems of adult
    Coloured transmission electron micrograph (TEM) of a transverse section through an artery. — Stock Photo
    Coloured transmission electron micrograph (TEM) of a transverse section through an artery.
    Red blood cells in blood vessel, digital illustration. — Stock Photo
    Red blood cells in blood vessel, digital illustration.
    Pathological anatomy of Stroke — Stock Photo
    Pathological anatomy of Stroke
    3d illustrations of the human heart with lines demonstrating blood flow. — Stock Photo
    3d illustrations of the human heart with lines demonstrating blood flow.
    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.
    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.
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration. — Stock Photo
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration.
    Vascular system of a child — Stock Photo
    Vascular system of a child
    Nanomachines working on red blood cells, digital illustration. — Stock Photo
    Nanomachines working on red blood cells, digital illustration.
    Cardiovascular system and blood vessels — Stock Photo
    Cardiovascular system and blood vessels
    Section of a muscular artery — Stock Photo
    Section of a muscular artery
    Human artery showing artery walls and bloodstream — Stock Photo
    Human artery showing artery walls and bloodstream
    Female cardiovascular system on black background. — Stock Photo
    Female cardiovascular system on black background.
    Red blood cells — Stock Photo
    Red blood cells
    HIV human immunodeficiency virus in bloodstream, digital illustration — Stock Photo
    HIV human immunodeficiency virus in bloodstream, digital illustration
    Nanomachines working on red and white blood cells, digital illustration. — Stock Photo
    Nanomachines working on red and white blood cells, digital illustration.
    Doctor practicing chest compression on cardiopulmonary resuscitation training dummy. — Stock Photo
    Doctor practicing chest compression on cardiopulmonary resuscitation training dummy.
    Doctor practicing chest compression on cardiopulmonary resuscitation training dummy. — Stock Photo
    Doctor practicing chest compression on cardiopulmonary resuscitation training dummy.
    Red blood cells — Stock Photo
    Red blood cells
    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.
    Red blood cells in blood vessel, digital illustration. — Stock Photo
    Red blood cells in blood vessel, digital illustration.
    Human Platelets, computer illustration — Stock Photo
    Human Platelets, computer illustration
    Healthy cardiovascular system — Stock Photo
    Healthy cardiovascular system
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration. — Stock Photo
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration.
    Blood supply network of human head — Stock Photo
    Blood supply network of human head
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration. — Stock Photo
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration.
    Skeletal and cardiovascular systems — Stock Photo
    Skeletal and cardiovascular systems
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration. — Stock Photo
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration.
    Brain's blood supply — Stock Photo
    Brain's blood supply
    Red blood cells — Stock Photo
    Red blood cells
    Human cardiovascular system — Stock Photo
    Human cardiovascular system
    Normal cardiovascular system — Stock Photo
    Normal cardiovascular system
    Digital illustration showing abundant lymphoblast cells in human blood in acute lymphoblastic leukaemia. — Stock Photo
    Digital illustration showing abundant lymphoblast cells in human blood in acute lymphoblastic leukaemia.
    Human brain anatomy — Stock Photo
    Human brain anatomy
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration. — Stock Photo
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration.
    Skeletal and cardiovascular systems of adult — Stock Photo
    Skeletal and cardiovascular systems of adult
    Red blood cells, digital illustration. — Stock Photo
    Red blood cells, digital illustration.
    Colored angiogram of carotid artery in neck of mature patient. — Stock Photo
    Colored angiogram of carotid artery in neck of mature patient.