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    Blood clotting in an ovarian follicle — Stock Photo
    Blood clotting in an ovarian follicle
    Abstract blood vessel with white and red blood cells, digital illustration. — Stock Photo
    Abstract blood vessel with white and red blood cells, digital illustration.
    Trypanosoma brucei protozoan — Stock Photo
    Trypanosoma brucei protozoan
    Blood clot or thrombus — Stock Photo
    Blood clot or thrombus
    Fat in blood cells blocking blood vessel, digital illustration. — Stock Photo
    Fat in blood cells blocking blood vessel, digital illustration.
    Active platelets in human blood with erythrocytes and leukocytes, computer illustration. — Stock Photo
    Active platelets in human blood with erythrocytes and leukocytes, computer illustration.
    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.
    Illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Illustration of cancer cell being attacked by white blood cells.
    HIV virus particles — Stock Photo
    HIV virus particles
    Red blood cells and platelets — Stock Photo
    Red blood cells and platelets
    Trypanosoma brucei protozoan — Stock Photo
    Trypanosoma brucei protozoan
    3d illustration of lymphocytes attacking cancer cells in human body. — Stock Photo
    3d illustration of lymphocytes attacking cancer cells in human body.
    3d illustration of white blood cells leukocytes secreting antibodies in human body. — Stock Photo
    3d illustration of white blood cells leukocytes secreting antibodies in human body.
    Colored illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Colored illustration of cancer cell being attacked by white blood cells.
    Digital illustration of eosinophil white blood cells with lobed nuclei colored in purple. — Stock Photo
    Digital illustration of eosinophil white blood cells with lobed nuclei colored in purple.
    Ruptured venule running through fatty tissue — Stock Photo
    Ruptured venule running through fatty tissue
    Neutrophil white blood cells, digital illustration. — Stock Photo
    Neutrophil white blood cells, digital illustration.
    Healthy Red blood cells — Stock Photo
    Healthy Red blood cells
    Red blood cells on black background, computer illustration. — Stock Photo
    Red blood cells on black background, computer illustration.
    Pathogenic bacteria in the blood stream — Stock Photo
    Pathogenic bacteria in the blood stream
    Narrowed blood vessel, computer illustration. — Stock Photo
    Narrowed blood vessel, computer illustration.
    Cholesterol plaque leading to atherosclerosis — Stock Photo
    Cholesterol plaque leading to atherosclerosis
    Colored illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Colored illustration of cancer cell being attacked by white blood cells.
    Eosinophil white blood cell, digital illustration. — Stock Photo
    Eosinophil white blood cell, digital illustration.
    Red and white blood cells — Stock Photo
    Red and white blood cells
    White blood cells with red blood cells, computer illustration. — Stock Photo
    White blood cells with red blood cells, computer illustration.
    Human artery showing artery walls and bloodstream — Stock Photo
    Human artery showing artery walls and bloodstream
    Bacteria amidst blood cells in blood vessel, digital illustration. — Stock Photo
    Bacteria amidst blood cells in blood vessel, digital illustration.
    3d illustration showing increase of non-functional white blood cells in leukaemia. — Stock Photo
    3d illustration showing increase of non-functional white blood cells in leukaemia.
    Active platelets in human blood with erythrocytes and leukocytes, computer illustration. — Stock Photo
    Active platelets in human blood with erythrocytes and leukocytes, computer illustration.
    Abstract blood vessel with white and red blood cells, digital illustration. — Stock Photo
    Abstract blood vessel with white and red blood cells, digital illustration.
    Cut in an artery seen from its interior — Stock Photo
    Cut in an artery seen from its interior
    Red blood cells — Stock Photo
    Red blood cells
    Computer illustration of neutrophil white blood cell chasing bacteria in blood stream. — Stock Photo
    Computer illustration of neutrophil white blood cell chasing bacteria in blood stream.
    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.
    Red blood cells in bloodstream — Stock Photo
    Red blood cells in bloodstream
    Red blood cells in blood stream — Stock Photo
    Red blood cells in blood stream
    Immune response to cancer — Stock Photo
    Immune response to cancer
    Diseased blood cells with bacteria, computer illustration. — Stock Photo
    Diseased blood cells with bacteria, computer illustration.
    Activated platelets in blood vessel — Stock Photo
    Activated platelets in blood vessel
    Human nerve structure in cross section, digital illustration. — Stock Photo
    Human nerve structure in cross section, digital illustration.
    Diseased blood cells with bacteria, computer illustration. — Stock Photo
    Diseased blood cells with bacteria, computer illustration.
    3d illustration of white blood cells leukocytes in human body. — Stock Photo
    3d illustration of white blood cells leukocytes in human body.
    Protozoan Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration. — Stock Photo
    Protozoan Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration.
    Red blood cells in sickle cell anaemia — Stock Photo
    Red blood cells in sickle cell anaemia
    Red blood cells on white background, digital illustration. — Stock Photo
    Red blood cells on white background, digital illustration.
    Human white blood cell — Stock Photo
    Human white blood cell
    Lymphocyte white blood cell in blood smear, digital illustration. — Stock Photo
    Lymphocyte white blood cell in blood smear, digital illustration.
    Dendritic cells of immune system — Stock Photo
    Dendritic cells of immune system
    Pyoderma skin disease — Stock Photo
    Pyoderma skin disease
    Human ovary structure — Stock Photo
    Human ovary structure
    Eosinophilia blood smear with numerous eosinophils, digital illustration. — Stock Photo
    Eosinophilia blood smear with numerous eosinophils, digital illustration.
    Red and white blood cells — Stock Photo
    Red and white blood cells
    Artery partially blocked by atheroma — Stock Photo
    Artery partially blocked by atheroma
    Activated platelets in blood vessel — Stock Photo
    Activated platelets in blood vessel
    Pathological anatomy of atherosclerosis — Stock Photo
    Pathological anatomy of atherosclerosis
    Brown Adenovirus particles, colored digital 3d illustration. — Stock Photo
    Brown Adenovirus particles, colored digital 3d illustration.
    Red blood cells and leukocytes in cross-section of blood vessel, digital illustration. — Stock Photo
    Red blood cells and leukocytes in cross-section of blood vessel, digital illustration.
    Basophil white blood cell, digital illustration. — Stock Photo
    Basophil white blood cell, digital illustration.
    3d illustration of leukocyte cells secreting allergen antibodies while allergy. — Stock Photo
    3d illustration of leukocyte cells secreting allergen antibodies while allergy.