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    Shoulder blood supply — Stock Photo
    Shoulder blood supply
    Human structural anatomy — Stock Photo
    Human structural anatomy
    Coloured scanning electron micrograph (SEM) of a section through a vein in the liver, which is filled with red blood cells (erythrocytes, red). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a section through a vein in the liver, which is filled with red blood cells (erythrocytes, red).
    Human heart circulatory and electrical system, 3d illustration. Cross section of the heart showing the ventricles and valves, and the electrical (conduction) system (yellow lines) and circulatory system (red and blue lines). — Stock Photo
    Human heart circulatory and electrical system, 3d illustration. Cross section of the heart showing the ventricles and valves, and the electrical (conduction) system (yellow lines) and circulatory system (red and blue lines).
    Bloodstream showing red blood cells — Stock Photo
    Bloodstream showing red blood cells
    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.
    Activated T lymphocytes and red blood cells on scanning electron micrograph. — Stock Photo
    Activated T lymphocytes and red blood cells on scanning electron micrograph.
    Coronary blood vessels of the heart — Stock Photo
    Coronary blood vessels of the heart
    Three dimensional medical illustration of male reproductive system with veins and arteries — Stock Photo
    Three dimensional medical illustration of male reproductive system with veins and arteries
    Human cardiovascular system — Stock Photo
    Human cardiovascular system
    Anatomy of bowman glomerular capsule — Stock Photo
    Anatomy of bowman glomerular capsule
    Red blood cells — Stock Photo
    Red blood cells
    Medical illustration of alveoli on black background — Stock Photo
    Medical illustration of alveoli on black background
    Female anatomy cardiovascular system with skeleton on black background. — Stock Photo
    Female anatomy cardiovascular system with skeleton on black background.
    Cardiovascular system showing veins and arteries — Stock Photo
    Cardiovascular system showing veins and arteries
    Medical illustration of circulatory system with heart and veins — Stock Photo
    Medical illustration of circulatory system with heart and veins
    Medical illustration of arteries, veins and lymphatic system in female midsection — Stock Photo
    Medical illustration of arteries, veins and lymphatic system in female midsection
    Human heart anatomy — Stock Photo
    Human heart anatomy
    Red blood cells in blood vessel, digital illustration. — Stock Photo
    Red blood cells in blood vessel, digital illustration.
    Vascular system of healthy adult — Stock Photo
    Vascular system of healthy adult
    Normal blood vessels, X-ray — Stock Photo
    Normal blood vessels, X-ray
    Human anatomical structure — Stock Photo
    Human anatomical structure
    Human anatomical structure — Stock Photo
    Human anatomical structure
    Sickle cell anemia — Stock Photo
    Sickle cell anemia
    3d illustration of activated platelets and thrombocytes while healing and closure of wound. — Stock Photo
    3d illustration of activated platelets and thrombocytes while healing and closure of wound.
    Red blood cells on white background, digital illustration. — Stock Photo
    Red blood cells on white background, digital illustration.
    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
    Medical chart with the signs and symptoms of kidney cancer — Stock Photo
    Medical chart with the signs and symptoms of kidney cancer
    Brain's blood supply — Stock Photo
    Brain's blood supply
    Medical illustration of blood vessels anatomy with labels — Stock Photo
    Medical illustration of blood vessels anatomy with labels
    Male anatomy with tissue and systems — Stock Photo
    Male anatomy with tissue and systems
    Vascular system and skeleton of an adult — Stock Photo
    Vascular system and skeleton of an adult
    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.
    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, digital illustration. — Stock Photo
    Red blood cells, digital illustration.
    Illustration of heart and circulatory system. — Stock Photo
    Illustration of heart and circulatory system.
    Normal blood cells in artery — Stock Photo
    Normal blood cells in artery
    Virus particles in blood stream, digital illustration. — Stock Photo
    Virus particles in blood stream, digital illustration.
    Skeletal and cardiovascular systems — Stock Photo
    Skeletal and cardiovascular systems
    Red blood cells on white background, digital illustration. — Stock Photo
    Red blood cells on white background, digital illustration.
    3D rendering of human skeleton with internal organs on black background — Stock Photo
    3D rendering of human skeleton with internal organs on black background
    Skeletal and cardiovascular systems of adult — Stock Photo
    Skeletal and cardiovascular systems of adult
    Medical illustration of blood clotting process inside artery — Stock Photo
    Medical illustration of blood clotting process inside artery
    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.
    Medical illustration of arteries, veins and lymphatic system with heart — Stock Photo
    Medical illustration of arteries, veins and lymphatic system with heart
    Coloured scanning electron micrograph (SEM) of a section through a vein in the liver, which is filled with red blood cells (erythrocytes, red). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a section through a vein in the liver, which is filled with red blood cells (erythrocytes, red).
    Ruptured venule running through fatty tissue — Stock Photo
    Ruptured venule running through fatty tissue
    Chest, neck and head arteries — Stock Photo
    Chest, neck and head arteries
    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.
    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 human alveoli anatomy — Stock Photo
    Normal human alveoli anatomy
    Human brain anatomy — Stock Photo
    Human brain anatomy
    Conceptual computer Illustration of human heart anatomy. — Stock Photo
    Conceptual computer Illustration of human heart anatomy.
    Cardiovascular system of an adult — Stock Photo
    Cardiovascular system of an adult
    Human vascular system — Stock Photo
    Human vascular system
    Blood vessels of the arms — Stock Photo
    Blood vessels of the arms
    Human heart circulatory and electrical system, 3d illustration. Cross section of the heart showing the ventricles and valves, and the electrical (conduction) system (yellow lines) and circulatory system (red and blue lines). — Stock Photo
    Human heart circulatory and electrical system, 3d illustration. Cross section of the heart showing the ventricles and valves, and the electrical (conduction) system (yellow lines) and circulatory system (red and blue lines).
    Cutaway view of the human kidney and adrenal gland — Stock Photo
    Cutaway view of the human kidney and adrenal gland
    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 foot with nervous, lymphatic and circulatory systems — Stock Photo
    Human foot with nervous, lymphatic and circulatory systems