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    Normal human alveoli — Stock Photo
    Normal human alveoli
    Normal human arteries, — Stock Photo
    Normal human arteries,
    Human alveoli anatomy — Stock Photo
    Human alveoli anatomy
    Artery partially blocked by an atheroma — Stock Photo
    Artery partially blocked by an atheroma
    Artery partially blocked by an atheroma — Stock Photo
    Artery partially blocked by an atheroma
    Normal human arteries, — Stock Photo
    Normal human arteries,
    Normal blood cells in artery — Stock Photo
    Normal blood cells in artery
    Normal pelvic veins — Stock Photo
    Normal pelvic veins
    Chest, neck and head arteries — Stock Photo
    Chest, neck and head arteries
    Narrowed abdominal arteries, coloured angiogram - blood vessel X-ray . — Stock Photo
    Narrowed abdominal arteries, coloured angiogram - blood vessel X-ray .
    3D computed tomography scan of arteries of brain. — Stock Photo
    3D computed tomography scan of arteries of brain.
    Normal human renal artery — Stock Photo
    Normal human renal artery
    Chest, neck and head arteries — Stock Photo
    Chest, neck and head arteries
    Chest, neck and head arteries — Stock Photo
    Chest, neck and head arteries
    Arteries of the human brain — Stock Photo
    Arteries of the human brain
    Human alveoli anatomy — Stock Photo
    Human alveoli anatomy
    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.
    Human alveoli anatomy — Stock Photo
    Human alveoli anatomy
    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).
    Artery partially blocked by an atheroma — Stock Photo
    Artery partially blocked by an atheroma
    Normal human alveoli — Stock Photo
    Normal human alveoli
    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.
    Red blood cells in an artery — Stock Photo
    Red blood cells in an artery
    Wall of a muscular artery — Stock Photo
    Wall of a muscular artery
    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).
    Human alveoli anatomy — Stock Photo
    Human alveoli anatomy