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    Illustration of low density cholesterol lipoprotein in bloodstream. — Stock Photo
    Illustration of low density cholesterol lipoprotein in bloodstream.
    Colored angiogram of carotid artery in neck of mature patient. — Stock Photo
    Colored angiogram of carotid artery in neck of mature patient.
    3D computed tomography scan of arteries of brain. — Stock Photo
    3D computed tomography scan of arteries of brain.
    Narrowed blood vessel, computer illustration. — Stock Photo
    Narrowed blood vessel, computer illustration.
    Normal leg veins, coloured angiogram - blood vessel X-ray — Stock Photo
    Normal leg veins, coloured angiogram - blood vessel X-ray
    Human red blood cells trapped in a fibrin blood clot, coloured scanning electron micrograph (SEM). — Stock Photo
    Human red blood cells trapped in a fibrin blood clot, coloured scanning electron micrograph (SEM).
    Coloured magnetic resonance angiogram (MRA) of the arteries (white) supplying the kidneys (blue, upper left and right). — Stock Photo
    Coloured magnetic resonance angiogram (MRA) of the arteries (white) supplying the kidneys (blue, upper left and right).
    3D computed tomography (CT) scan of normal arteries in the brain of a 35 year old. — Stock Photo
    3D computed tomography (CT) scan of normal arteries in the brain of a 35 year old.
    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).
    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.
    Coloured angiogram (blood vessel X-ray) of arteries in the pelvic region. — Stock Photo
    Coloured angiogram (blood vessel X-ray) of arteries in the pelvic region.
    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).
    3D computed tomography (CT) scan of normal arteries in the brain of a 35 year old. — Stock Photo
    3D computed tomography (CT) scan of normal arteries in the brain of a 35 year old.
    Narrowed abdominal arteries, coloured angiogram - blood vessel X-ray . — Stock Photo
    Narrowed abdominal arteries, coloured angiogram - blood vessel X-ray .
    Conceptual computer Illustration of human heart anatomy. — Stock Photo
    Conceptual computer Illustration of human heart anatomy.
    Section of a muscular artery — Stock Photo
    Section of a muscular artery
    Light micrograph of a section through tissue showing an artery (middle ) and a vein (top left). — Stock Photo
    Light micrograph of a section through tissue showing an artery (middle ) and a vein (top left).
    Coloured three-dimensional computed tomography (CT) scan of a posterior view of a healthy rib cage and heart. — Stock Photo
    Coloured three-dimensional computed tomography (CT) scan of a posterior view of a healthy rib cage and heart.
    Medical illustration of female lymphatic system with heart — Stock Photo
    Medical illustration of female lymphatic system with heart
    Blood cells in a blood vessel — Stock Photo
    Blood cells in a blood vessel
    Coloured scanning electron micrograph (SEM) of a section through a foetal vein filled with red blood cells (erythrocytes, red). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a section through a foetal vein filled with red blood cells (erythrocytes, red).
    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).
    Wall of a muscular artery — Stock Photo
    Wall of a muscular artery
    Blood cells in a blood vessel — Stock Photo
    Blood cells in a blood vessel
    Arteries and veins of the hand — Stock Photo
    Arteries and veins of the hand
    Heart of glass anatomy — Stock Photo
    Heart of glass anatomy
    Arteries and veins of the hand — Stock Photo
    Arteries and veins of the hand
    Human heart anatomy — Stock Photo
    Human heart anatomy
    Heart and circulatory system — Stock Photo
    Heart and circulatory system
    Cut in an artery seen from its interior — Stock Photo
    Cut in an artery seen from its interior
    Visual rendering of Heart anatomy — Stock Photo
    Visual rendering of Heart anatomy
    Red blood cells in an artery — Stock Photo
    Red blood cells in an artery
    Pathological anatomy of Stroke — Stock Photo
    Pathological anatomy of Stroke
    Patient with a heart pacemaker — Stock Photo
    Patient with a heart pacemaker
    Dual chamber pacemaker — Stock Photo
    Dual chamber pacemaker
    Human alveoli anatomy — Stock Photo
    Human alveoli anatomy
    Dual chamber pacemaker — Stock Photo
    Dual chamber pacemaker
    Newborn digestive and cardio-vascular systems — Stock Photo
    Newborn digestive and cardio-vascular systems
    Healthy heart anatomy — Stock Photo
    Healthy heart anatomy
    Dual chamber pacemaker — Stock Photo
    Dual chamber pacemaker
    Schematic representation of human vein structure — Stock Photo
    Schematic representation of human vein structure
    Human structural anatomy — Stock Photo
    Human structural anatomy
    Normal blood cells in artery — Stock Photo
    Normal blood cells in artery
    Dual chamber pacemaker — Stock Photo
    Dual chamber pacemaker
    Prosthetic heart valves — Stock Photo
    Prosthetic heart valves
    Red blood cells — Stock Photo
    Red blood cells
    Schematic representation of human vein structure — Stock Photo
    Schematic representation of human vein structure
    Internal organs and skeletal system — Stock Photo
    Internal organs and skeletal system
    Atherosclerosis and narrowed artery — Stock Photo
    Atherosclerosis and narrowed artery
    Skeletal and cardiovascular systems of adult — Stock Photo
    Skeletal and cardiovascular systems of adult
    Normal blood vessels, X-ray — Stock Photo
    Normal blood vessels, X-ray
    Human vein showing tissue stratification — Stock Photo
    Human vein showing tissue stratification
    Normal and healthy abdomen anatomy — Stock Photo
    Normal and healthy abdomen anatomy
    Skeletal and cardiovascular systems of adult — Stock Photo
    Skeletal and cardiovascular systems of adult
    Activated platelets with canalicular system — Stock Photo
    Activated platelets with canalicular system
    Prosthetic heart valves — Stock Photo
    Prosthetic heart valves
    Normal blood cells in artery — Stock Photo
    Normal blood cells in artery
    Human veins anatomy — Stock Photo
    Human veins anatomy
    Prosthetic heart valves — Stock Photo
    Prosthetic heart valves
    Human artery showing artery walls and bloodstream — Stock Photo
    Human artery showing artery walls and bloodstream