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    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.
    Conceptual illustration of human heart spiked with syringes. — Stock Photo
    Conceptual illustration of human heart spiked with syringes.
    Male anatomy showing vascular system, computer illustration. — Stock Photo
    Male anatomy showing vascular system, computer illustration.
    Bacteria amidst blood cells in blood vessel, digital illustration. — Stock Photo
    Bacteria amidst blood cells in blood vessel, digital 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.
    HIV virus particles — Stock Photo
    HIV virus particles
    Female body with visible cardiovascular system, digital illustration — Stock Photo
    Female body with visible cardiovascular system, digital illustration
    Head louse on human hair, digital illustration. — Stock Photo
    Head louse on human hair, digital illustration.
    Female abdominal anatomy and internal organs, computer illustration. — Stock Photo
    Female abdominal anatomy and internal organs, computer illustration.
    Cardiovascular system and blood vessels — Stock Photo
    Cardiovascular system and blood vessels
    Illustration of figure of obese man with visible heart. — Stock Photo
    Illustration of figure of obese man with visible heart.
    Female silhouette showing heart anatomy, computer illustration. — Stock Photo
    Female silhouette showing heart anatomy, computer illustration.
    Mosquito of family Culicidae — Stock Photo
    Mosquito of family Culicidae
    Blood stream and artery walls — Stock Photo
    Blood stream and artery walls
    Male upper body anatomy and internal organs in low angle view, computer illustration. — Stock Photo
    Male upper body anatomy and internal organs in low angle view, computer illustration.
    Pathogenic bacteria in the blood stream — Stock Photo
    Pathogenic bacteria in the blood stream
    Cells trapped in fibrin protein mesh — Stock Photo
    Cells trapped in fibrin protein mesh
    Head louse on white background, digital illustration. — Stock Photo
    Head louse on white background, digital illustration.
    3d rendered illustration of vascular system of human head. — Stock Photo
    3d rendered illustration of vascular system of human head.
    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.
    Transparent body model showing male anatomy and internal organs, digital illustration. — Stock Photo
    Transparent body model showing male anatomy and internal organs, digital illustration.
    Illustration of female silhouette with painful heart. — Stock Photo
    Illustration of female silhouette with painful heart.
    Human silhouette showing heart with blood vessels and bronchial tree on white background. — Stock Photo
    Human silhouette showing heart with blood vessels and bronchial tree on white background.
    Human vein showing tissue stratification — Stock Photo
    Human vein showing tissue stratification
    Crenated red blood cells — Stock Photo
    Crenated red blood cells
    Human heart anatomy — Stock Photo
    Human heart anatomy
    Erythrocytes red blood cells in human blood vessel, digital illustration. — Stock Photo
    Erythrocytes red blood cells in human blood vessel, digital illustration.
    Illustration of overweight woman with visible heart on black background. — Stock Photo
    Illustration of overweight woman with visible heart on black background.
    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).
    Heart anatomy in male thorax, computer illustration. — Stock Photo
    Heart anatomy in male thorax, computer illustration.
    Illustration of abnormal red blood cells known as spur cells acanthocytes. — Stock Photo
    Illustration of abnormal red blood cells known as spur cells acanthocytes.
    Illustration of silhouette of obese man with visible heart. — Stock Photo
    Illustration of silhouette of obese man with visible heart.
    Realistic human body model showing male anatomy with internal organs, digital illustration. — Stock Photo
    Realistic human body model showing male anatomy with internal organs, digital illustration.
    Normal red blood cells — Stock Photo
    Normal red blood cells
    Medical nanorobot in human blood vessel, panoramic digital illustration. — Stock Photo
    Medical nanorobot in human blood vessel, panoramic digital illustration.
    Red blood cells in sickle cell anaemia — Stock Photo
    Red blood cells in sickle cell anaemia
    Normal red blood cells — Stock Photo
    Normal red blood cells
    Head louse on white background, digital illustration. — Stock Photo
    Head louse on white background, digital illustration.
    Researcher extracting blood from a vial — Stock Photo
    Researcher extracting blood from a vial
    Illustration of senior woman blue silhouette with highlighted heart on black background. — Stock Photo
    Illustration of senior woman blue silhouette with highlighted heart on black background.
    Illustration of male office worker vascular system. — Stock Photo
    Illustration of male office worker vascular system.
    Vascular system of neck in male body, computer illustration. — Stock Photo
    Vascular system of neck in male body, computer illustration.
    Female upper body anatomy and muscular system, computer illustration. — Stock Photo
    Female upper body anatomy and muscular system, computer illustration.
    Illustration of human silhouette with painful heart. — Stock Photo
    Illustration of human silhouette with painful heart.
    Digital illustration of diseased fatty human heart and cross-section close-up of atherosclerotic plaque histological structure, necrotic centre, foam cells and T-lymphocytes. — Stock Photo
    Digital illustration of diseased fatty human heart and cross-section close-up of atherosclerotic plaque histological structure, necrotic centre, foam cells and T-lymphocytes.
    Illustration of clot of human blood cells. — Stock Photo
    Illustration of clot of human blood cells.
    Illustration of senior woman blue silhouette with highlighted heart on white background. — Stock Photo
    Illustration of senior woman blue silhouette with highlighted heart on white background.
    Human compact bone tissue, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Human compact bone tissue, light micrograph. Haematoxylin and eosin stain.
    Human heart model on white background, computer illustration. — Stock Photo
    Human heart model on white background, computer illustration.
    Activated macrophage attacking bacteria — Stock Photo
    Activated macrophage attacking bacteria
    Realistic body model showing female anatomy on white background, computer illustration. — Stock Photo
    Realistic body model showing female anatomy on white background, computer illustration.
    Low angle view of anatomical model showing female anatomy and internal organs, computer illustration. — Stock Photo
    Low angle view of anatomical model showing female anatomy and internal organs, computer illustration.
    Digital illustration of hypochromic and microcytic red blood cells while iron deficiency anaemia. — Stock Photo
    Digital illustration of hypochromic and microcytic red blood cells while iron deficiency anaemia.
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Ruptured venule running through fatty tissue — Stock Photo
    Ruptured venule running through fatty tissue
    Male upper body anatomy and internal organs in low angle view, computer illustration. — Stock Photo
    Male upper body anatomy and internal organs in low angle view, computer illustration.
    Female upper body anatomy and internal organs, computer illustration. — Stock Photo
    Female upper body anatomy and internal organs, computer illustration.
    Intestinal lining. Coloured scanning electron micrograph (SEM) of a freeze-fractured of the small intestine. The surface consists of deep folds, called villi. The intestinal surface( yellow) is exposed to food — Stock Photo
    Intestinal lining. Coloured scanning electron micrograph (SEM) of a freeze-fractured of the small intestine. The surface consists of deep folds, called villi. The intestinal surface( yellow) is exposed to food
    Nervous and circulatory systems — Stock Photo
    Nervous and circulatory systems
    Blood vessels of human head and neck, digital illustration. — Stock Photo
    Blood vessels of human head and neck, digital illustration.