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    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).
    Medical illustration of arteries, veins and lymphatic system in female midsection — Stock Photo
    Medical illustration of arteries, veins and lymphatic system in female midsection
    Medical illustration of male skeleton with ureter system — Stock Photo
    Medical illustration of male skeleton with ureter system
    Medical illustration of human circulatory system — Stock Photo
    Medical illustration of human circulatory system
    Ruptured venule running through fatty tissue — Stock Photo
    Ruptured venule running through fatty tissue
    Anatomy of human kidney function with labels — Stock Photo
    Anatomy of human kidney function with labels
    Medical illustration of alveoli on black background — Stock Photo
    Medical illustration of alveoli on black background
    Ruptured venule running through fatty tissue — Stock Photo
    Ruptured venule running through fatty tissue
    Wall of a muscular artery — Stock Photo
    Wall of a muscular artery
    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
    Blood vessels of the neck — Stock Photo
    Blood vessels of the neck
    Coronary blood vessels of the heart — Stock Photo
    Coronary blood vessels of the heart
    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
    Healthy artery anatomy — Stock Photo
    Healthy artery anatomy
    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
    Schematic representation of human vein structure — Stock Photo
    Schematic representation of human vein structure
    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
    Skeletal and cardiovascular systems of adult — Stock Photo
    Skeletal and cardiovascular systems of adult
    Normal blood cells in artery — Stock Photo
    Normal blood cells in artery
    Human veins anatomy — Stock Photo
    Human veins anatomy
    Human artery showing artery walls and bloodstream — Stock Photo
    Human artery showing artery walls and bloodstream
    Normal blood cells in artery — Stock Photo
    Normal blood cells in artery
    Representation of human anatomy — Stock Photo
    Representation of human anatomy
    Blood vessels of the arms — Stock Photo
    Blood vessels of the arms
    Human vein showing tissue stratification — Stock Photo
    Human vein showing tissue stratification
    Bloodstream showing red blood cells — Stock Photo
    Bloodstream showing red blood cells
    Human anatomical structure — Stock Photo
    Human anatomical structure
    Human artery showing artery walls and bloodstream — Stock Photo
    Human artery showing artery walls and bloodstream
    Red blood cells — Stock Photo
    Red blood cells
    Human anatomical structure — Stock Photo
    Human anatomical structure
    Human artery showing artery walls and bloodstream — Stock Photo
    Human artery showing artery walls and bloodstream
    Red blood cells — Stock Photo
    Red blood cells
    Cross-section of human artery — Stock Photo
    Cross-section of human artery
    Red blood cells — Stock Photo
    Red blood cells
    Cholesterol plaque leading to atherosclerosis — Stock Photo
    Cholesterol plaque leading to atherosclerosis
    Human vein showing tissue stratification — Stock Photo
    Human vein showing tissue stratification
    Blood supply network of human head — Stock Photo
    Blood supply network of human head
    Human artery showing artery walls and bloodstream — Stock Photo
    Human artery showing artery walls and bloodstream
    Red blood cells — Stock Photo
    Red blood cells
    Skeletal and cardiovascular systems of adult — Stock Photo
    Skeletal and cardiovascular systems of adult
    Representation of Circulatory system — Stock Photo
    Representation of Circulatory system
    Healthy red blood cells — Stock Photo
    Healthy red blood cells
    Human artery showing artery walls and bloodstream — Stock Photo
    Human artery showing artery walls and bloodstream
    Healthy cardiovascular system — Stock Photo
    Healthy cardiovascular system
    Cholesterol plaque leading to atherosclerosis — Stock Photo
    Cholesterol plaque leading to atherosclerosis
    Normal red blood cells — Stock Photo
    Normal red blood cells
    Healthy cardiovascular system — Stock Photo
    Healthy cardiovascular system
    Red blood cells — Stock Photo
    Red blood cells
    Red blood cells — Stock Photo
    Red blood cells
    Erythrocytes or red blood cells — Stock Photo
    Erythrocytes or red blood cells
    Human red blood cells — Stock Photo
    Human red blood cells