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1854 results

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    Human immunodeficiency virus infection — Stock Photo
    Human immunodeficiency virus infection
    Skeletal and cardiovascular systems — Stock Photo
    Skeletal and cardiovascular systems
    Female body with visible heart and cardiovascular system, digital illustration. — Stock Photo
    Female body with visible heart and cardiovascular system, digital illustration.
    Scientist examining specimen under microscope during clinical trial in laboratory. — Stock Photo
    Scientist examining specimen under microscope during clinical trial in laboratory.
    Activated macrophage attacking bacteria — Stock Photo
    Activated macrophage attacking bacteria
    Basophil white blood cell, digital illustration. — Stock Photo
    Basophil white blood cell, digital illustration.
    Fat in blood cells blocking blood vessel, digital illustration. — Stock Photo
    Fat in blood cells blocking blood vessel, digital illustration.
    Polio virus particles in the bloodstream — Stock Photo
    Polio virus particles in the bloodstream
    Diseased blood cells with bacteria, computer illustration. — Stock Photo
    Diseased blood cells with bacteria, computer illustration.
    Head louse on white background, digital illustration. — Stock Photo
    Head louse on white background, digital illustration.
    Bacteria amidst blood cells in blood vessel, digital illustration. — Stock Photo
    Bacteria amidst blood cells in blood vessel, digital illustration.
    Cardiovascular system of arm and shoulder — Stock Photo
    Cardiovascular system of arm and shoulder
    3d rendered illustration of human heart. — Stock Photo
    3d rendered illustration of human heart.
    Colored illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Colored illustration of cancer cell being attacked by white blood cells.
    Lymphocyte, monocyte and neutrophil white blood cells in blood smear, digital illustration. — Stock Photo
    Lymphocyte, monocyte and neutrophil white blood cells in blood smear, digital illustration.
    Organs comprising human digestive system — Stock Photo
    Organs comprising human digestive system
    Illustration of heart in transparent male silhouette. — Stock Photo
    Illustration of heart in transparent male silhouette.
    Internal organs and pelvic girdle — Stock Photo
    Internal organs and pelvic girdle
    Human skin anatomy and blood supply — Stock Photo
    Human skin anatomy and blood supply
    Artery partially blocked by atheroma — Stock Photo
    Artery partially blocked by atheroma
    Healthy female vascular system, computer illustration — Stock Photo
    Healthy female vascular system, 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.
    3d rendered illustration of colored female heart in body silhouette. — Stock Photo
    3d rendered illustration of colored female heart in body silhouette.
    Illustration of human heart in body silhouette. — Stock Photo
    Illustration of human heart in body silhouette.
    Illustration of human heart in body silhouette. — Stock Photo
    Illustration of human heart in body silhouette.
    Illustration of heart tumour in male body silhouette on black background. — Stock Photo
    Illustration of heart tumour in male body silhouette on black background.
    Cardiovascular system transporting nutrients and oxygen — Stock Photo
    Cardiovascular system transporting nutrients and oxygen
    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 human body with internal organs, nervous, lymphatic and circulatory systems — Stock Photo
    Transparent human body with internal organs, nervous, lymphatic and circulatory systems
    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.
    Female anatomy showing heart in transparent body silhouette, computer illustration. — Stock Photo
    Female anatomy showing heart in transparent body silhouette, computer illustration.
    Cardiovascular system in female body, digital illustration. — Stock Photo
    Cardiovascular system in female body, digital illustration.
    Blood vessels of foot, computer illustration — Stock Photo
    Blood vessels of foot, computer illustration
    Parasitic tick biting skin — Stock Photo
    Parasitic tick biting skin
    Normal human red blood cell — Stock Photo
    Normal human red blood cell
    Plasmodium ovale protozoan inside red blood cells in the stage of schizont, computer illustration — Stock Photo
    Plasmodium ovale protozoan inside red blood cells in the stage of schizont, computer illustration
    3d illustration of lymphocytes attacking cancer cells in human body. — Stock Photo
    3d illustration of lymphocytes attacking cancer cells in human body.
    Male back anatomy and skeletal system, computer illustration. — Stock Photo
    Male back anatomy and skeletal system, computer illustration.
    Colored scanning electron micrograph image of tooth dentine, mineralised connective tissue found under tooth enamel. — Stock Photo
    Colored scanning electron micrograph image of tooth dentine, mineralised connective tissue found under tooth enamel.
    Vascular system of human head, computer illustration. — Stock Photo
    Vascular system of human head, computer illustration.
    Head louse on human hair, digital illustration. — Stock Photo
    Head louse on human hair, digital illustration.
    Tick on human skin, computer illustration. — Stock Photo
    Tick on human skin, computer illustration.
    Realistic human heart and blood vessels on black background, digital illustration. — Stock Photo
    Realistic human heart and blood vessels on black background, digital illustration.
    Normal human arteries, — Stock Photo
    Normal human arteries,
    Realistic obese body model showing female anatomy on white background, computer illustration. — Stock Photo
    Realistic obese body model showing female anatomy on white background, computer illustration.
    Protozoa Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration. — Stock Photo
    Protozoa Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration.
    3d illustration of red blood cells erythrocytes. — Stock Photo
    3d illustration of red blood cells erythrocytes.
    Red blood cells — Stock Photo
    Red blood cells
    Trypanosoma brucei protozoan — Stock Photo
    Trypanosoma brucei protozoan
    Digital three dimensional illustration of human lungs. — Stock Photo
    Digital three dimensional illustration of human lungs.
    Female body with visible vascular system, computer illustration. — Stock Photo
    Female body with visible vascular system, 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.
    Human body model showing male anatomy and blood vessels, digital illustration. — Stock Photo
    Human body model showing male anatomy and blood vessels, digital illustration.
    Visible heart in female body silhouette, computer illustration. — Stock Photo
    Visible heart in female body silhouette, computer illustration.
    Illustration of human heart in body silhouette. — Stock Photo
    Illustration of human heart in body silhouette.
    3d rendered illustration of a biker heart on black background. — Stock Photo
    3d rendered illustration of a biker heart on black background.
    Illustration of visible pancreas and organs in human body silhouette. — Stock Photo
    Illustration of visible pancreas and organs in human body silhouette.
    Cross-section of human artery — Stock Photo
    Cross-section of human artery
    Computer illustration of a blood clot inside vein, known as venous thrombus. — Stock Photo
    Computer illustration of a blood clot inside vein, known as venous thrombus.
    Vascular system of human head, computer illustration. — Stock Photo
    Vascular system of human head, computer illustration.