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    Illustration of cancerous tumour in female heart. — Stock Photo
    Illustration of cancerous tumour in female heart.
    Coloured scanning electron micrograph (SEM) of a human red blood cell (erythrocyte, red) and a white blood cell (leucoocyte, blue). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a human red blood cell (erythrocyte, red) and a white blood cell (leucoocyte, blue).
    White blood cells, digital illustration. — Stock Photo
    White blood cells, digital illustration.
    Caring woman using pulse oximeter on finger of ill boy in oxygen mask using nebulizer during inhalation at home — Stock Photo
    Caring woman using pulse oximeter on finger of ill boy in oxygen mask using nebulizer during inhalation at home
    Grey human heart model on white background, computer illustration. — Stock Photo
    Grey human heart model on white background, computer illustration.
    Veins in transparent dog body, cropped, anatomical computer illustration. — Stock Photo
    Veins in transparent dog body, cropped, anatomical computer illustration.
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Illustration of figure of obese man with visible heart. — Stock Photo
    Illustration of figure of obese man with visible heart.
    Mature male doctor processing donor blood in bags. — Stock Photo
    Mature male doctor processing donor blood in bags.
    Entamoeba histolytica consuming red blood cells — Stock Photo
    Entamoeba histolytica consuming red blood cells
    3d illustration of blood knot in artery vessel. — Stock Photo
    3d illustration of blood knot in artery vessel.
    Babesia parasites inside red blood cell, computer illustration — Stock Photo
    Babesia parasites inside red blood cell, computer illustration
    3d illustration of blood plasma and components of blood flowing from artery. — Stock Photo
    3d illustration of blood plasma and components of blood flowing from artery.
    Plasmodium malariae protozoa in blood vessel, computer illustration. — Stock Photo
    Plasmodium malariae protozoa in blood vessel, computer illustration.
    Cardiovascular system transporting nutrients and oxygen — Stock Photo
    Cardiovascular system transporting nutrients and oxygen
    Cropped shot of physician using stethoscope on patient's hand — Stock Photo
    Cropped shot of physician using stethoscope on patient's hand
    Forensics expert in protective suit writing in clipboard collecting evidence from crime scene. — Stock Photo
    Forensics expert in protective suit writing in clipboard collecting evidence from crime scene.
    Illustration of schistosoma blood fluke flatworm. — Stock Photo
    Illustration of schistosoma blood fluke flatworm.
    Mid section of laboratory technician analyzing chemical solution — Stock Photo
    Mid section of laboratory technician analyzing chemical solution
    Injured girl treated by paramedic at accident spot — Stock Photo
    Injured girl treated by paramedic at accident spot
    Blood orange with half — Stock Photo
    Blood orange with half
    Head louse on white background, digital illustration. — Stock Photo
    Head louse on white background, digital illustration.
    Close-up of pipetting blood into sample pot of clear liquid. — Stock Photo
    Close-up of pipetting blood into sample pot of clear liquid.
    Abstract blood vessel with white and red blood cells, digital illustration. — Stock Photo
    Abstract blood vessel with white and red blood cells, digital illustration.
    Illustration of small tick biting human skin. — Stock Photo
    Illustration of small tick biting human skin.
    Female hands testing blood sample — Stock Photo
    Female hands testing blood sample
    3d rendered illustration of vascular system of human head. — Stock Photo
    3d rendered illustration of vascular system of human head.
    Physiotherapist checking blood pressure of woman in clinic — Stock Photo
    Physiotherapist checking blood pressure of woman in clinic
    Male body silhouette showing heart anatomy, computer illustration. — Stock Photo
    Male body silhouette showing heart anatomy, computer illustration.
    Forensics expert dusting for fingerprints at crime scene. — Stock Photo
    Forensics expert dusting for fingerprints at crime scene.
    Neutrophil in human blood, computer illustration. — Stock Photo
    Neutrophil in human blood, computer illustration.
    Blood test kit and and analysis results — Stock Photo
    Blood test kit and and analysis results
    Colored X-ray showing blood vessels in lung. — Stock Photo
    Colored X-ray showing blood vessels in lung.
    Scientists preparing multiwell plate with blood samples for testing and analysis. — Stock Photo
    Scientists preparing multiwell plate with blood samples for testing and analysis.
    Fat in blood cells blocking blood vessel, digital illustration. — Stock Photo
    Fat in blood cells blocking blood vessel, digital illustration.
    White blood cells, digital illustration. — Stock Photo
    White blood cells, digital illustration.
    Illustration of low density cholesterol lipoprotein in bloodstream. — Stock Photo
    Illustration of low density cholesterol lipoprotein in bloodstream.
    Blood samples in centrifuge tubes on white background. — Stock Photo
    Blood samples in centrifuge tubes on white background.
    Close-up shot of delicious Various slices of citrus fruits — Stock Photo
    Close-up shot of delicious Various slices of citrus fruits
    Digital illustration of senior man anatomy showing heart. — Stock Photo
    Digital illustration of senior man anatomy showing heart.
    Parasitic louse on human head skin, digital illustration. — Stock Photo
    Parasitic louse on human head skin, digital illustration.
    Male body with visible vascular system, computer illustration. — Stock Photo
    Male body with visible vascular system, computer illustration.
    White blood cells, digital illustration. — Stock Photo
    White blood cells, digital illustration.
    Human red blood cells — Stock Photo
    Human red blood cells
    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.
    Black pudding with onion toasts — Stock Photo
    Black pudding with onion toasts
    Bacteria and viruses in human artery, digital illustration. — Stock Photo
    Bacteria and viruses in human artery, digital illustration.
    Biological samples in test tubes and Petri dishes on laboratory table. — Stock Photo
    Biological samples in test tubes and Petri dishes on laboratory table.
    Cropped view of male doctor holding sphygmomanometer in hand. — Stock Photo
    Cropped view of male doctor holding sphygmomanometer in hand.
    Female anatomy showing vascular system, digital illustration. — Stock Photo
    Female anatomy showing vascular system, digital illustration.
    Male head and neck anatomy, digital illustration. — Stock Photo
    Male head and neck anatomy, digital illustration.
    Nurse smiling and taking blood pressure of senior woman. — Stock Photo
    Nurse smiling and taking blood pressure of senior woman.
    Laboratory technician analyzing chemical solution in blood bank — Stock Photo
    Laboratory technician analyzing chemical solution in blood bank
    Doctor drawing blood — Stock Photo
    Doctor drawing blood
    Lymphocyte white blood cell in human lymphatic system, digital illustration. — Stock Photo
    Lymphocyte white blood cell in human lymphatic system, digital illustration.
    Structure of dog vascular system with colorful blood vessels in transparent body, cropped, computer illustration. — Stock Photo
    Structure of dog vascular system with colorful blood vessels in transparent body, cropped, computer illustration.
    3d rendered illustration of little tick on skin surface. — Stock Photo
    3d rendered illustration of little tick on skin surface.
    Rack of test tubes with blood samples in laboratory. — Stock Photo
    Rack of test tubes with blood samples in laboratory.
    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.
    Male body with visible vascular system, computer illustration. — Stock Photo
    Male body with visible vascular system, computer illustration.