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    A cross-section of a green walnut (seen from above) — Stock Photo
    A cross-section of a green walnut (seen from above)
    Half of red onion on white background. — Stock Photo
    Half of red onion on white background.
    Cholesterol plaque leading to atherosclerosis — Stock Photo
    Cholesterol plaque leading to atherosclerosis
    Front view mid section of an athletic Caucasian man and woman wearing sports clothes cross training at a gym, standing and weight training with barbells — Stock Photo
    Front view mid section of an athletic Caucasian man and woman wearing sports clothes cross training at a gym, standing and weight training with barbells
    Digital illustration of abnormal white blood cells B-lymphocytes while hairy cell leukaemia. — Stock Photo
    Digital illustration of abnormal white blood cells B-lymphocytes while hairy cell leukaemia.
    Human skull mid sagittal cross-section, side view on white background. — Stock Photo
    Human skull mid sagittal cross-section, side view on white background.
    Coloured scanning electron micrograph (SEM) of a section through a vein in the liver, which is filled with red blood cells (erythrocytes, red). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a section through a vein in the liver, which is filled with red blood cells (erythrocytes, red).
    Girl standing in a living room holding a pumpkin decoration — Stock Photo
    Girl standing in a living room holding a pumpkin decoration
    Insulin binding to insulin receptor — Stock Photo
    Insulin binding to insulin receptor
    Close-up of sliced heirloom cherry tomatoes, full frame — Stock Photo
    Close-up of sliced heirloom cherry tomatoes, full frame
    Arteries of the human brain — Stock Photo
    Arteries of the human brain
    Conceptual computer illustration of human brain structure shown in cross-section — Stock Photo
    Conceptual computer illustration of human brain structure shown in cross-section
    Croissants with striped pattern on white background — Stock Photo
    Croissants with striped pattern on white background
    Human vertebra anatomy — Stock Photo
    Human vertebra anatomy
    Cross-section through a cotton stem — Stock Photo
    Cross-section through a cotton stem
    Halved raw round red cabbage cut across middle. — Stock Photo
    Halved raw round red cabbage cut across middle.
    Newborn head and chest anatomy — Stock Photo
    Newborn head and chest anatomy
    Half of lemon on white background. — Stock Photo
    Half of lemon on white background.
    Low section of man using laptop at bed with notebook. — Stock Photo
    Low section of man using laptop at bed with notebook.
    Slices of citrus fruits on plate and glass of juice — Stock Photo
    Slices of citrus fruits on plate and glass of juice
    Conceptual ketchup bottle cut in half with a real tomato inside — Stock Photo
    Conceptual ketchup bottle cut in half with a real tomato inside
    Illustration of human skin anatomy on white background. — Stock Photo
    Illustration of human skin anatomy on white background.
    Colored computed tomography scan of section through brain of senior male patient with dementia. — Stock Photo
    Colored computed tomography scan of section through brain of senior male patient with dementia.
    Woman cutting a carrot cake with nuts — Stock Photo
    Woman cutting a carrot cake with nuts
    Liver cancer. Coloured axial computed tomography (CT) scan through the abdomen of an 80-year-old man with cancer of the liver. The liver is at center left — Stock Photo
    Liver cancer. Coloured axial computed tomography (CT) scan through the abdomen of an 80-year-old man with cancer of the liver. The liver is at center left
    Healthy and Infected bronchus — Stock Photo
    Healthy and Infected bronchus
    Jug of orange juice and fresh fruits — Stock Photo
    Jug of orange juice and fresh fruits
    3d illustration of flu pathogen in cross-section. — Stock Photo
    3d illustration of flu pathogen in cross-section.
    Magnified digital illustration of human cell cross-section. — Stock Photo
    Magnified digital illustration of human cell cross-section.
    Light micrograph of a plant stem cross section. Haematoxylin and eosin stain. — Stock Photo
    Light micrograph of a plant stem cross section. Haematoxylin and eosin stain.
    Woman's legs lying on a blanket in the mountains, Switzerland — Stock Photo
    Woman's legs lying on a blanket in the mountains, Switzerland
    Conceptual orange juice bottle cut in half with a real orange inside — Stock Photo
    Conceptual orange juice bottle cut in half with a real orange inside
    Fresh ripe cauliflower over black background — Stock Photo
    Fresh ripe cauliflower over black background
    Human large intestine — Stock Photo
    Human large intestine
    Structure of cellular organelles — Stock Photo
    Structure of cellular organelles
    Team watching woman doing speed ladder drill in sunny park — Stock Photo
    Team watching woman doing speed ladder drill in sunny park
    Fractured myelinated nerve fibres — Stock Photo
    Fractured myelinated nerve fibres
    Polished sectioned ammonite fossil on black background. — Stock Photo
    Polished sectioned ammonite fossil on black background.
    Slice of yellow tomato — Stock Photo
    Slice of yellow tomato
    Coloured computed tomography (CT) scan of the brain of a 25 year old patient with a meningioma (blue). — Stock Photo
    Coloured computed tomography (CT) scan of the brain of a 25 year old patient with a meningioma (blue).
    Cake with buttercream icing and peaches — Stock Photo
    Cake with buttercream icing and peaches
    Three different onions — Stock Photo
    Three different onions
    Girl sitting on a chair holding a crucifix — Stock Photo
    Girl sitting on a chair holding a crucifix
    Human eye anatomy, computer illustration. — Stock Photo
    Human eye anatomy, computer illustration.
    Human eye anatomy, computer illustration. — Stock Photo
    Human eye anatomy, computer illustration.
    Close-up of a slice of kiwi fruit — Stock Photo
    Close-up of a slice of kiwi fruit
    Close-up of a carrot cake cut in half — Stock Photo
    Close-up of a carrot cake cut in half
    Diagram of theoretical interior of ice giant planet Uranus. — Stock Photo
    Diagram of theoretical interior of ice giant planet Uranus.
    Human skull mid sagittal cross-section with brain on white background. — Stock Photo
    Human skull mid sagittal cross-section with brain on white background.
    Closeup of ripe appetizing kiwi fruits on wooden table — Stock Photo
    Closeup of ripe appetizing kiwi fruits on wooden table
    Human nerve structure in cross section, digital illustration. — Stock Photo
    Human nerve structure in cross section, digital illustration.
    Human eye anatomy — Stock Photo
    Human eye anatomy
    Coloured scanning electron micrograph of human cancellous spongy bone tissue. — Stock Photo
    Coloured scanning electron micrograph of human cancellous spongy bone tissue.
    Slice of kiwi fruit — Stock Photo
    Slice of kiwi fruit
    Low section of businesswoman walking on road — Stock Photo
    Low section of businesswoman walking on road
    Beautiful texture of an oak log surface — Stock Photo
    Beautiful texture of an oak log surface
    Wilms tumour of the kidney — Stock Photo
    Wilms tumour of the kidney
    Cake with cream and fruit filling and chocolate decoration — Stock Photo
    Cake with cream and fruit filling and chocolate decoration
    Human heart, computer illustration — Stock Photo
    Human heart, computer illustration
    Female anatomy showing internal organs on white background. — Stock Photo
    Female anatomy showing internal organs on white background.