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    Schematic representation of human vein structure — Stock Photo
    Schematic representation of human vein structure
    T lymphocyte (orange) attached to a cancer cell (blue), illustration. T lymphocytes are a type of white blood cell which matures in the thymus — Stock Photo
    T lymphocyte (orange) attached to a cancer cell (blue), illustration. T lymphocytes are a type of white blood cell which matures in the thymus
    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.
    Paramedics examining injured girl on street — Stock Photo
    Paramedics examining injured girl on street
    Illustration of heart in male body silhouette on white background. — Stock Photo
    Illustration of heart in male body silhouette on white background.
    Close-up of blood bag and plasma bag in blood bank — Stock Photo
    Close-up of blood bag and plasma bag in blood bank
    Two adorable turtles lying on wet tree branch near pond in zoo — Stock Photo
    Two adorable turtles lying on wet tree branch near pond in zoo
    Veins in transparent dog body, anatomical computer illustration. — Stock Photo
    Veins in transparent dog body, anatomical computer illustration.
    Blood bags against white background. — Stock Photo
    Blood bags against white background.
    Male vascular system — Stock Photo
    Male vascular system
    Wedges of Sicilian blood oranges — Stock Photo
    Wedges of Sicilian blood oranges
    Woman checking her blood pressure. — Stock Photo
    Woman checking her blood pressure.
    Pan-fried foie gras — Stock Photo
    Pan-fried foie gras
    Tick on human skin, computer illustration. — Stock Photo
    Tick on human skin, computer illustration.
    Structure of neutrophil white blood cell, digital illustration. — Stock Photo
    Structure of neutrophil white blood cell, digital illustration.
    Normal cardiovascular system — Stock Photo
    Normal cardiovascular system
    Interaction between virus and dendritic cell, computer illustration. Dendritic cells play a crucial role in initiating immune responses against viruses — Stock Photo
    Interaction between virus and dendritic cell, computer illustration. Dendritic cells play a crucial role in initiating immune responses against viruses
    Senior couple checking blood pressure in living room — Stock Photo
    Senior couple checking blood pressure in living room
    Doctor using fingers for feeling patient pulse, close-up. — Stock Photo
    Doctor using fingers for feeling patient pulse, close-up.
    Close-up of rack of sample tubes with blood for analysis. — Stock Photo
    Close-up of rack of sample tubes with blood for analysis.
    Abstract blood vessel with white and red blood cells, digital illustration. — Stock Photo
    Abstract blood vessel with white and red blood cells, digital illustration.
    Blood test kit and and analysis results — Stock Photo
    Blood test kit and and analysis results
    Medical samples — Stock Photo
    Medical samples
    Illustration of a blood clot in damaged blood vessel made of red blood cells, platelets and fibrin protein strands. — Stock Photo
    Illustration of a blood clot in damaged blood vessel made of red blood cells, platelets and fibrin protein strands.
    Human bronchi and heart, illustration — Stock Photo
    Human bronchi and heart, illustration
    Blood supply of neck and head — Stock Photo
    Blood supply of neck and head
    3d rendered illustration of vascular system of human head. — Stock Photo
    3d rendered illustration of vascular system of human head.
    Medical illustration of alveoli on black background — Stock Photo
    Medical illustration of alveoli on black background
    Cropped unrecognizable doctor's hand showing a positive blood test of Coronavirus against a pink background — Stock Photo
    Cropped unrecognizable doctor's hand showing a positive blood test of Coronavirus against a pink background
    Petri dishes with blood agar on blue background. — Stock Photo
    Petri dishes with blood agar on blue background.
    Blood samples ready for analysis — Stock Photo
    Blood samples ready for analysis
    Close-up of machine in blood bank — Stock Photo
    Close-up of machine in blood bank
    Human body model showing female anatomy and nervous system, digital 3d render illustration. — Stock Photo
    Human body model showing female anatomy and nervous system, digital 3d render illustration.
    Anatomical model of internal organs with cross section on white background. — Stock Photo
    Anatomical model of internal organs with cross section on white background.
    Red blood cells in blood vessel, digital illustration. — Stock Photo
    Red blood cells in blood vessel, digital illustration.
    Arteries of the human brain — Stock Photo
    Arteries of the human brain
    Coloured angiogram (blood vessel X-ray) of the coronary arteries of a 52 year old patient. The artery at right has had a stent placed in it to treat a blockage. — Stock Photo
    Coloured angiogram (blood vessel X-ray) of the coronary arteries of a 52 year old patient. The artery at right has had a stent placed in it to treat a blockage.
    Female body with visible cardiovascular system, digital illustration. — Stock Photo
    Female body with visible cardiovascular system, digital illustration.
    Illustration of leucocyte cell surrounded by antibodies on white background. — Stock Photo
    Illustration of leucocyte cell surrounded by antibodies on white background.
    Fat in blood cells blocking blood vessel, digital illustration. — Stock Photo
    Fat in blood cells blocking blood vessel, digital illustration.
    3d illustration of lymphocytes attacking cancer cells in human body. — Stock Photo
    3d illustration of lymphocytes attacking cancer cells in human body.
    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.
    Illustration of tick parasite crawling on human skin surface. — Stock Photo
    Illustration of tick parasite crawling on human skin surface.
    Cross-section of the human eye, 3d illustration. — Stock Photo
    Cross-section of the human eye, 3d illustration.
    Common Jackal (Canis Aureus) and Black-backed Jackal (Canis mesomelas) attacking and killing a Thomsons Gazelle (Gazella thomsoni) for food; Tanzania — Stock Photo
    Common Jackal (Canis Aureus) and Black-backed Jackal (Canis mesomelas) attacking and killing a Thomsons Gazelle (Gazella thomsoni) for food; Tanzania
    Colored scanning electron micrograph of activated T lymphocyte from human blood sample. — Stock Photo
    Colored scanning electron micrograph of activated T lymphocyte from human blood sample.
    Crop unrecognizable doctors standing near operating table with blood suction catheters and needles during surgery in modern clinic — Stock Photo
    Crop unrecognizable doctors standing near operating table with blood suction catheters and needles during surgery in modern clinic
    Mature woman testing blood pressure with machine. — Stock Photo
    Mature woman testing blood pressure with machine.
    Cardiovascular system of healthy adult — Stock Photo
    Cardiovascular system of healthy adult
    Donated blood in plastic bag — Stock Photo
    Donated blood in plastic bag
    Neutrophil white blood cell, digital illustration. — Stock Photo
    Neutrophil white blood cell, digital illustration.
    Red blood cells — Stock Photo
    Red blood cells
    Heart capillary with red blood cell between muscle fibres, colored scanning electron micrograph. — Stock Photo
    Heart capillary with red blood cell between muscle fibres, colored scanning electron micrograph.
    Blood sample in test tube in hand of scientist. — Stock Photo
    Blood sample in test tube in hand of scientist.
    Blood moon eclipse at nighttime, black background — Stock Photo
    Blood moon eclipse at nighttime, black background
    Illustration showing different types of blood cells, erythrocytes, neutrophil, monocyte, basophil, eosinophil, lymphocyte, and platelets. — Stock Photo
    Illustration showing different types of blood cells, erythrocytes, neutrophil, monocyte, basophil, eosinophil, lymphocyte, and platelets.
    Blood cells, light micrograph. — Stock Photo
    Blood cells, light micrograph.
    Transparent body model showing male anatomy and internal organs, digital illustration. — Stock Photo
    Transparent body model showing male anatomy and internal organs, digital illustration.
    Stacked Petri dishes with blood agar on plain background. — Stock Photo
    Stacked Petri dishes with blood agar on plain background.
    Close up of Petri Dish — Stock Photo
    Close up of Petri Dish