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    Female vascular system structure of legs, computer illustration. — Stock Photo
    Female vascular system structure of legs, computer illustration.
    Low angle view illustration of blue silhouette of obese woman with highlighted heart. — Stock Photo
    Low angle view illustration of blue silhouette of obese woman with highlighted heart.
    Female abdominal vascular system, computer illustration. — Stock Photo
    Female abdominal vascular system, computer illustration.
    Group of surgeons performing operation in operation theater of hospital — Stock Photo
    Group of surgeons performing operation in operation theater of hospital
    Micropipette pipetting blood sample into Petri dishes. — Stock Photo
    Micropipette pipetting blood sample into Petri dishes.
    Red blood cells — Stock Photo
    Red blood cells
    Chef gutting a Mackerel. — Stock Photo
    Chef gutting a Mackerel.
    Nanobot in bloodstream with red erythrocytes, digital illustration. — Stock Photo
    Nanobot in bloodstream with red erythrocytes, digital illustration.
    Close-up portrait of cheetah (Acinonyx jubatus) with blood stained face; Tanzania — Stock Photo
    Close-up portrait of cheetah (Acinonyx jubatus) with blood stained face; Tanzania
    Paramedics putting injured girl onto a backboard on street — Stock Photo
    Paramedics putting injured girl onto a backboard on street
    Structural anatomy of human pelvis — Stock Photo
    Structural anatomy of human pelvis
    Empty medical armchairs prepared for donors in modern blood transfusion center with contemporary equipment — Stock Photo
    Empty medical armchairs prepared for donors in modern blood transfusion center with contemporary equipment
    Arteries in transparent dog body, anatomical computer illustration. — Stock Photo
    Arteries in transparent dog body, anatomical computer illustration.
    Human papillomavirus particles in the bloodstream — Stock Photo
    Human papillomavirus particles in the bloodstream
    3d illustration of violet bacteria on blue surface. — Stock Photo
    3d illustration of violet bacteria on blue surface.
    Narrowed blood vessel, computer illustration. — Stock Photo
    Narrowed blood vessel, computer illustration.
    Female donor with patch on hand sitting in medical chair after blood transfusion procedure — Stock Photo
    Female donor with patch on hand sitting in medical chair after blood transfusion procedure
    Female doctor taking blood from senior male patient in clinic examination room — Stock Photo
    Female doctor taking blood from senior male patient in clinic examination room
    Digital illustration of nit egg of human head louse attached to human hair. — Stock Photo
    Digital illustration of nit egg of human head louse attached to human hair.
    Group of doctors caring for patient in hospital ward — Stock Photo
    Group of doctors caring for patient in hospital ward
    Female nurse checking blood pressure of senior male patient in clinic examination room — Stock Photo
    Female nurse checking blood pressure of senior male patient in clinic examination room
    Cardiovascular system in normal male body, computer illustration. — Stock Photo
    Cardiovascular system in normal male body, computer illustration.
    Close-up of pipetting samples into Petri dishes. — Stock Photo
    Close-up of pipetting samples into Petri dishes.
    Blood vessels of foot, computer illustration — Stock Photo
    Blood vessels of foot, computer illustration
    Colored illustration of mosquito pest on skin. — Stock Photo
    Colored illustration of mosquito pest on skin.
    Red blood cells. Coloured scanning electron micrograph (SEM) of red blood cells (RBCs, erythrocytes). Red blood cells are biconcave, disc-shaped cells that transport oxygen from the lungs to body cells — Stock Photo
    Red blood cells. Coloured scanning electron micrograph (SEM) of red blood cells (RBCs, erythrocytes). Red blood cells are biconcave, disc-shaped cells that transport oxygen from the lungs to body cells
    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
    Stent and balloon catheter for implantation into blood vessel, digital illustration. — Stock Photo
    Stent and balloon catheter for implantation into blood vessel, digital illustration.
    Anatomy of back of human hand — Stock Photo
    Anatomy of back of human hand
    Headache, computer illustration. A male body, with skeleton, holding its head in pain. The red area in the skull represents the pain of a headache — Stock Photo
    Headache, computer illustration. A male body, with skeleton, holding its head in pain. The red area in the skull represents the pain of a headache
    Donor blood being separated into component parts in bag. — Stock Photo
    Donor blood being separated into component parts in bag.
    Male abdominal organs, midsection, digital illustration. — Stock Photo
    Male abdominal organs, midsection, digital illustration.
    Red blood cells and platelets — Stock Photo
    Red blood cells and platelets
    Plasmodium vivax protozoa and red blood cells, digital illustration. — Stock Photo
    Plasmodium vivax protozoa and red blood cells, digital illustration.
    Scanning electron microscopy of DNA molecules and red and white blood cells. — Stock Photo
    Scanning electron microscopy of DNA molecules and red and white blood cells.
    Vascular system in male body, computer illustration. — Stock Photo
    Vascular system in male body, computer illustration.
    Immunodeficiency virus infection in blood stream — Stock Photo
    Immunodeficiency virus infection in blood stream
    Close-up of pipetting sample into microcentrifuge tubes. — Stock Photo
    Close-up of pipetting sample into microcentrifuge tubes.
    Realistic body model showing female anatomy of muscles, mammary glands and blood vessels, computer illustration. — Stock Photo
    Realistic body model showing female anatomy of muscles, mammary glands and blood vessels, computer illustration.
    Illustration of a dendritic cell (centre, purple) activating T-cells (teal). Dendritic cells recognise viruses and present information about their antigens to T-cells — Stock Photo
    Illustration of a dendritic cell (centre, purple) activating T-cells (teal). Dendritic cells recognise viruses and present information about their antigens to T-cells
    Cardiovascular system of an adult — Stock Photo
    Cardiovascular system of an adult
    Close-up of pipetting blood sample into microcentrifuge tubes. — Stock Photo
    Close-up of pipetting blood sample into microcentrifuge tubes.
    Digital artwork of white blood cells attacking red illuminated cancer cell. — Stock Photo
    Digital artwork of white blood cells attacking red illuminated cancer cell.
    Forensics expert collecting evidence bullet from crime scene. — Stock Photo
    Forensics expert collecting evidence bullet from crime scene.
    Close-up of blood sample in kidney dish. — Stock Photo
    Close-up of blood sample in kidney dish.
    Red blood cells in the bloodstream — Stock Photo
    Red blood cells in the bloodstream
    Cropped shot of hands of woman testing cholesterol. — Stock Photo
    Cropped shot of hands of woman testing cholesterol.
    Cardiovascular system in male body, computer illustration. — Stock Photo
    Cardiovascular system in male body, computer illustration.
    Illustration of male office worker vascular system. — Stock Photo
    Illustration of male office worker vascular system.
    Abstract blood vessel with white and red blood cells, digital illustration. — Stock Photo
    Abstract blood vessel with white and red blood cells, digital illustration.
    Digital health. Testing blood pressure. — Stock Photo
    Digital health. Testing blood pressure.
    Low angle on blood vessels of human upper body, digital illustration. — Stock Photo
    Low angle on blood vessels of human upper body, digital illustration.
    Labelled test tubes with blood samples. — Stock Photo
    Labelled test tubes with blood samples.
    Top view of mosaic or pattern of positive blood tests over blue background. — Stock Photo
    Top view of mosaic or pattern of positive blood tests over blue background.
    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.
    Close up of Long-Nosed Snake — Stock Photo
    Close up of Long-Nosed Snake
    Medical illustration of human blood vessels of abdomen. — Stock Photo
    Medical illustration of human blood vessels of abdomen.
    Activation of T-cell immune response, illustration. — Stock Photo
    Activation of T-cell immune response, illustration.
    Close-up of stethoscope alongside blood sample in test tube, syringe and medical vial in a clinic. — Stock Photo
    Close-up of stethoscope alongside blood sample in test tube, syringe and medical vial in a clinic.
    B cells and antibodies, computer illustration. — Stock Photo
    B cells and antibodies, computer illustration.