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    Illustration of platelets (thrombocytes) that have been activated (with extensions) and those that are non-activated. Platelets are part of the blood. When a blood vessel is damaged, the platelets become activated and secrete chemicals that cause the — Stock Photo
    Illustration of platelets (thrombocytes) that have been activated (with extensions) and those that are non-activated. Platelets are part of the blood. When a blood vessel is damaged, the platelets become activated and secrete chemicals that cause the
    Atherosclerosis and narrowed artery — Stock Photo
    Atherosclerosis and narrowed artery
    Schematic representation of human vein structure — Stock Photo
    Schematic representation of human vein structure
    Skeletal and cardiovascular systems — Stock Photo
    Skeletal and cardiovascular systems
    Vascular system of healthy adult — Stock Photo
    Vascular system of healthy adult
    Human heart anatomy — Stock Photo
    Human heart anatomy
    Blood supply network of human head — Stock Photo
    Blood supply network of human head
    Male anatomy with tissue and systems — Stock Photo
    Male anatomy with tissue and systems
    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.
    Human artery showing artery walls and bloodstream — Stock Photo
    Human artery showing artery walls and bloodstream
    Narrowed artery causing atherosclerosis — Stock Photo
    Narrowed artery causing atherosclerosis
    Arteries and veins of the hand — Stock Photo
    Arteries and veins of the hand
    Normal human arteries, — Stock Photo
    Normal human arteries,
    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.
    Red blood cells in blood vessel, digital illustration. — Stock Photo
    Red blood cells in blood vessel, digital illustration.
    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.
    Blood vessel with blood cells — Stock Photo
    Blood vessel with blood cells
    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.
    Human Platelets, computer illustration — Stock Photo
    Human Platelets, computer illustration
    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.
    Skeletal and cardiovascular systems — Stock Photo
    Skeletal and cardiovascular systems
    Internal organs, circulatory and nervous systems — Stock Photo
    Internal organs, circulatory and nervous systems
    Red blood cells — Stock Photo
    Red blood cells
    Heart of glass anatomy — Stock Photo
    Heart of glass anatomy
    Cross-section of human artery — Stock Photo
    Cross-section of human artery
    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.
    Human artery showing artery walls and bloodstream — Stock Photo
    Human artery showing artery walls and bloodstream
    Skeletal and cardiovascular systems — Stock Photo
    Skeletal and cardiovascular systems
    Red blood cells in blood vessel, digital illustration. — Stock Photo
    Red blood cells in blood vessel, digital illustration.
    Adult male anatomy — Stock Photo
    Adult male 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.
    Male anatomy with tissue and systems — Stock Photo
    Male anatomy with tissue and systems
    Illustration showing different types of blood cells, erythrocytes, neutrophil, monocyte, basophil, eosinophil, lymphocyte, and platelets. — Stock Photo
    Illustration showing different types of blood cells, erythrocytes, neutrophil, monocyte, basophil, eosinophil, lymphocyte, and platelets.
    Red blood cells in blood vessel, digital illustration. — Stock Photo
    Red blood cells in blood vessel, digital illustration.
    Human heart anatomy — Stock Photo
    Human heart anatomy
    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).
    Red blood cells — Stock Photo
    Red blood cells
    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.
    Red blood cells in blood vessel, digital illustration. — Stock Photo
    Red blood cells in blood vessel, digital illustration.
    Human cardiovascular system — Stock Photo
    Human cardiovascular system
    Human Platelets, computer illustration — Stock Photo
    Human Platelets, computer illustration
    Cardiovascular system of an adult — Stock Photo
    Cardiovascular system of an adult
    Blood vessels of the neck — Stock Photo
    Blood vessels of the neck
    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.
    Normal blood cells in artery — Stock Photo
    Normal blood cells in artery
    Cholesterol plaque leading to atherosclerosis — Stock Photo
    Cholesterol plaque leading to atherosclerosis
    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.
    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.
    Blood vessels of the brain — Stock Photo
    Blood vessels of the brain