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    Bacteria amidst blood cells in blood vessel, digital illustration. — Stock Photo
    Bacteria amidst blood cells in blood vessel, digital illustration.
    Medical illustration of alveoli on black background — Stock Photo
    Medical illustration of alveoli on black background
    Human heart with colored pulmonary trunk, computer illustration. — Stock Photo
    Human heart with colored pulmonary trunk, computer illustration.
    Illustration of two bypasses in human heart. — Stock Photo
    Illustration of two bypasses in human heart.
    Red blood cells — Stock Photo
    Red blood cells
    Vascular system of a child — Stock Photo
    Vascular system of a child
    Male body with visible vascular system, computer illustration. — Stock Photo
    Male body with visible vascular system, computer illustration.
    3D rendering of human lymphatic system on black background — Stock Photo
    3D rendering of human lymphatic system on black background
    Vascular system of neck in male body, computer illustration. — Stock Photo
    Vascular system of neck in male body, computer illustration.
    Structure of dog vascular system with colorful blood vessels in transparent body, computer illustration. — Stock Photo
    Structure of dog vascular system with colorful blood vessels in transparent body, computer illustration.
    3D rendering of human circulatory system on black background — Stock Photo
    3D rendering of human circulatory system on black background
    Patient with a heart pacemaker — Stock Photo
    Patient with a heart pacemaker
    Circulatory and nervous systems — Stock Photo
    Circulatory and nervous systems
    Human heart anatomy — Stock Photo
    Human heart anatomy
    Heart anatomy in male thorax, computer illustration. — Stock Photo
    Heart anatomy in male thorax, computer illustration.
    Cardiovascular system with emphasis on heart — Stock Photo
    Cardiovascular system with emphasis on heart
    3D rendering of human lymphatic system with skeleton — Stock Photo
    3D rendering of human lymphatic system with skeleton
    Human skull with brain and circulatory system — Stock Photo
    Human skull with brain and circulatory system
    Transparent human body showing heart and main circulatory system with internal organs, nervous, lymphatic and circulatory systems — Stock Photo
    Transparent human body showing heart and main circulatory system with internal organs, nervous, lymphatic and circulatory systems
    Illustration of human blood cells on black background. — Stock Photo
    Illustration of human blood cells on black background.
    Blood vessels of the head, computer illustration — Stock Photo
    Blood vessels of the head, computer illustration
    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 body model showing male anatomy and blood vessels, digital illustration. — Stock Photo
    Human body model showing male anatomy and blood vessels, digital illustration.
    Human vein showing tissue stratification — Stock Photo
    Human vein showing tissue stratification
    Human body model showing male anatomy and blood vessels, digital illustration. — Stock Photo
    Human body model showing male anatomy and blood vessels, digital illustration.
    Grey human heart model on white background, computer illustration. — Stock Photo
    Grey human heart model on white background, computer illustration.
    Erythrocytes and leukocytes blood cells in human blood vessel, digital illustration. — Stock Photo
    Erythrocytes and leukocytes blood cells in human blood vessel, digital illustration.
    Arterial stent implant, medical digital illustration. — Stock Photo
    Arterial stent implant, medical digital illustration.
    Digital illustration of senior man anatomy showing heart. — Stock Photo
    Digital illustration of senior man anatomy showing heart.
    Abstract blood vessel with white and red blood cells, digital illustration. — Stock Photo
    Abstract blood vessel with white and red blood cells, digital illustration.
    Human heart model on white background, computer illustration. — Stock Photo
    Human heart model on white background, computer illustration.
    Vascular system of female upper body, computer illustration. — Stock Photo
    Vascular system of female upper body, computer illustration.
    Blood pumping around a human heart, illustration. — Stock Photo
    Blood pumping around a human heart, illustration.
    Vascular system of female upper body, computer illustration. — Stock Photo
    Vascular system of female upper body, computer illustration.
    Blood vessel with blood cells — Stock Photo
    Blood vessel with blood cells
    Illustration of bypass in human heart. — Stock Photo
    Illustration of bypass in human heart.
    Illustration of figure of obese man with visible heart. — Stock Photo
    Illustration of figure of obese man with visible heart.
    Transparent view of human body showing kidneys and skeletal system — Stock Photo
    Transparent view of human body showing kidneys and skeletal system
    Realistic human heart model on black background, computer illustration. — Stock Photo
    Realistic human heart model on black background, computer illustration.
    Blood supply network of human head — Stock Photo
    Blood supply network of human head
    White blood cells with red blood cells, computer illustration. — Stock Photo
    White blood cells with red blood cells, computer illustration.
    Female body with visible heart and vascular system, digital illustration — Stock Photo
    Female body with visible heart and vascular system, digital illustration
    Human heart anatomy — Stock Photo
    Human heart anatomy
    Cardiovascular system in normal male body, computer illustration. — Stock Photo
    Cardiovascular system in normal male body, computer illustration.
    Brain's blood supply — Stock Photo
    Brain's blood supply
    Pathological anatomy of Stroke — Stock Photo
    Pathological anatomy of Stroke
    Realistic human heart model on black background, computer illustration. — Stock Photo
    Realistic human heart model on black background, computer illustration.
    Human heart with colored mitral valve, computer illustration. — Stock Photo
    Human heart with colored mitral valve, computer illustration.
    Medical illustration of alveoli on black background — Stock Photo
    Medical illustration of alveoli on black background
    Vascular system in normal female body, digital illustration — Stock Photo
    Vascular system in normal female body, digital illustration
    Male anatomy reference — Stock Photo
    Male anatomy reference
    Activated blood cell fragments platelets, coloured scanning electron micrograph. — Stock Photo
    Activated blood cell fragments platelets, coloured scanning electron micrograph.
    Artery partially blocked by atheroma — Stock Photo
    Artery partially blocked by atheroma
    Male vascular system — Stock Photo
    Male vascular system
    Illustration of malaria infected blood cells. — Stock Photo
    Illustration of malaria infected blood cells.
    Dual chamber pacemaker — Stock Photo
    Dual chamber pacemaker
    Illustration of senior woman with heart tumour on black background. — Stock Photo
    Illustration of senior woman with heart tumour on black background.
    Human heart, computer illustration. — Stock Photo
    Human heart, computer illustration.
    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.
    Skeletal and cardiovascular systems — Stock Photo
    Skeletal and cardiovascular systems