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    Light micrograph of red blood cells (erythrocytes, red) in a blood vessel. — Stock Photo
    Light micrograph of red blood cells (erythrocytes, red) in a blood vessel.
    Doctor checking grip strength for patient — Stock Photo
    Doctor checking grip strength for patient
    Cancer cells with blood vessel formation — Stock Photo
    Cancer cells with blood vessel formation
    White blood cell structure — Stock Photo
    White blood cell structure
    Human skin anatomy and blood supply — Stock Photo
    Human skin anatomy and blood supply
    Cat flea head — Stock Photo
    Cat flea head
    Illustration of schistosoma blood fluke flatworm on black background. — Stock Photo
    Illustration of schistosoma blood fluke flatworm on black background.
    Human white blood cell — Stock Photo
    Human white blood cell
    Forensics expert dusting for fingerprints at crime scene. — Stock Photo
    Forensics expert dusting for fingerprints at crime scene.
    Doctor practicing chest compression on cardiopulmonary resuscitation training dummy. — Stock Photo
    Doctor practicing chest compression on cardiopulmonary resuscitation training dummy.
    Close-up of blood pressure gauge. — Stock Photo
    Close-up of blood pressure gauge.
    Blood oranges and clementines — Stock Photo
    Blood oranges and clementines
    3d rendered illustration of little tick on skin surface. — Stock Photo
    3d rendered illustration of little tick on skin surface.
    Plasmodium vivax protozoan inside red blood cells, digital illustration. — Stock Photo
    Plasmodium vivax protozoan inside red blood cells, digital illustration.
    Close-up of blood pressure gauge. — Stock Photo
    Close-up of blood pressure gauge.
    Girl sitting at a table eating a blood orange — Stock Photo
    Girl sitting at a table eating a blood orange
    Female abdominal anatomy and internal organs, computer illustration. — Stock Photo
    Female abdominal anatomy and internal organs, computer illustration.
    Active CAR T-cells cancer immunotherapy, medical illustration. — Stock Photo
    Active CAR T-cells cancer immunotherapy, medical illustration.
    Illustration of aortic aneurysm in human heart. — Stock Photo
    Illustration of aortic aneurysm in human heart.
    Close-up of a macrophage, illustration. — Stock Photo
    Close-up of a macrophage, illustration.
    Structure of eosinophil blood cell — Stock Photo
    Structure of eosinophil blood cell
    Doctor using a lance to take a finger prick blood sample from a patient. — Stock Photo
    Doctor using a lance to take a finger prick blood sample from a patient.
    Tube with blood sample on metal tray in laboratory, close-up. — Stock Photo
    Tube with blood sample on metal tray in laboratory, close-up.
    Blood cells and Plasmodium sp. parasites (at schizont stage) causing malaria, computer illustration. — Stock Photo
    Blood cells and Plasmodium sp. parasites (at schizont stage) causing malaria, computer illustration.
    Muscular and skeletal systems — Stock Photo
    Muscular and skeletal systems
    Hand holding a multiwell tray containing blood samples. — Stock Photo
    Hand holding a multiwell tray containing blood samples.
    Close-up shot of delicious Blood oranges — Stock Photo
    Close-up shot of delicious Blood oranges
    Digital illustration of immunoglobulin in blood. — Stock Photo
    Digital illustration of immunoglobulin in blood.
    Whole and half blood oranges — Stock Photo
    Whole and half blood oranges
    Black horse in field — Stock Photo
    Black horse in field
    Protozoan Plasmodium malariae inside red blood cell in the schizont stage, computer illustration — Stock Photo
    Protozoan Plasmodium malariae inside red blood cell in the schizont stage, computer illustration
    Labelled vacutainer tubes containing blood samples, close-up. — Stock Photo
    Labelled vacutainer tubes containing blood samples, close-up.
    Digital illustration of cross-section of blood vessel with acute lymphoblastic leukaemia showing abundant lymphoblasts. — Stock Photo
    Digital illustration of cross-section of blood vessel with acute lymphoblastic leukaemia showing abundant lymphoblasts.
    Female doctor drawing blood from senior male patient in clinic examination room — Stock Photo
    Female doctor drawing blood from senior male patient in clinic examination room
    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.
    3d illustration of cross section of hair follicle with description. — Stock Photo
    3d illustration of cross section of hair follicle with description.
    Female silhouette showing heart anatomy, computer illustration. — Stock Photo
    Female silhouette showing heart anatomy, computer illustration.
    Human brain with blood supply network — Stock Photo
    Human brain with blood supply network
    Adult male structural anatomy — Stock Photo
    Adult male structural anatomy
    Collage of a lot of blue protection masks over yellow background zenith view — Stock Photo
    Collage of a lot of blue protection masks over yellow background zenith view
    Red human heart on black background, computer illustration. — Stock Photo
    Red human heart on black background, computer illustration.
    Shoulder blood supply — Stock Photo
    Shoulder blood supply
    Human heart against blue background, illustration. — Stock Photo
    Human heart against blue background, illustration.
    Colored illustration of mosquito pest on skin. — Stock Photo
    Colored illustration of mosquito pest on skin.
    Structure of neutrophil white blood cell, digital illustration. — Stock Photo
    Structure of neutrophil white blood cell, digital illustration.
    Boy sitting on a step with a sticking plaster on his cut knee — Stock Photo
    Boy sitting on a step with a sticking plaster on his cut knee
    Wedge of blood orange on knife — Stock Photo
    Wedge of blood orange on knife
    Coloured scanning electron micrograph of macrophage white blood cell. — Stock Photo
    Coloured scanning electron micrograph of macrophage white blood cell.
    Illustration of human heart anatomy on blue background. — Stock Photo
    Illustration of human heart anatomy on blue background.
    Female anatomy showing cardiovascular system on white background. — Stock Photo
    Female anatomy showing cardiovascular system on white background.
    Researcher preparing samples of donated blood for analysis. — Stock Photo
    Researcher preparing samples of donated blood for analysis.
    Female silhouette showing heart anatomy, computer illustration. — Stock Photo
    Female silhouette showing heart anatomy, computer illustration.
    Red blood cells, digital illustration. — Stock Photo
    Red blood cells, digital illustration.
    Digital illustration of Neisseria gonorrhoeae bacteria inside neutrophil blood cell. — Stock Photo
    Digital illustration of Neisseria gonorrhoeae bacteria inside neutrophil blood cell.
    Artery partially blocked by an atheroma — Stock Photo
    Artery partially blocked by an atheroma
    T-cell receptor-MHC-antigen complexes — Stock Photo
    T-cell receptor-MHC-antigen complexes
    Heart attack in human body, conceptual illustration. — Stock Photo
    Heart attack in human body, conceptual illustration.
    African American male doctor in medical glove demonstrating test tube with blood sample on white background — Stock Photo
    African American male doctor in medical glove demonstrating test tube with blood sample on white background
    Side view of male doctor checking blood pressure of senior patient blood pressure gauge at clinic — Stock Photo
    Side view of male doctor checking blood pressure of senior patient blood pressure gauge at clinic
    Illustration of heart in transparent male silhouette. — Stock Photo
    Illustration of heart in transparent male silhouette.