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    Cancer invasion into surrounding tissues, conceptual computer illustration. — Stock Photo
    Cancer invasion into surrounding tissues, conceptual computer illustration.
    Digital illustration of human cells on blue background. — Stock Photo
    Digital illustration of human cells on blue background.
    Cancer cells and blood vessels — Stock Photo
    Cancer cells and blood vessels
    Digital illustration of shaped virus cells. — Stock Photo
    Digital illustration of shaped virus cells.
    Measles virus particles, digital illustration. — Stock Photo
    Measles virus particles, digital illustration.
    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.
    Dividing stem cells — Stock Photo
    Dividing stem cells
    Colored scanning electron micrograph of cancer cells from human colon. — Stock Photo
    Colored scanning electron micrograph of cancer cells from human colon.
    HIV virus particles — Stock Photo
    HIV virus particles
    Neutrophil and monocyte white blood cells in blood smear, digital illustration. — Stock Photo
    Neutrophil and monocyte white blood cells in blood smear, digital illustration.
    Illustration of transparent cells with splitting nucleus, cell membrane and visible chromosomes. — Stock Photo
    Illustration of transparent cells with splitting nucleus, cell membrane and visible chromosomes.
    Rotavirus virus particles in the bloodstream — Stock Photo
    Rotavirus virus particles in the bloodstream
    Illustration of bacteriophages (purple) infecting a bacterial cell. Bacteriophages, or phages, infect a bacterium by attaching to its surface (blue) and injecting genetic material (brown) into the cell — Stock Photo
    Illustration of bacteriophages (purple) infecting a bacterial cell. Bacteriophages, or phages, infect a bacterium by attaching to its surface (blue) and injecting genetic material (brown) into the cell
    Tumour tissue cells, digital illustration. — Stock Photo
    Tumour tissue cells, digital illustration.
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Human lung tissue, light micrograph. Lungs are the primary organs of the respiratory system in humans and many other animals. Haematoxylin and eosin stain. — Stock Photo
    Human lung tissue, light micrograph. Lungs are the primary organs of the respiratory system in humans and many other animals. Haematoxylin and eosin stain.
    Colored scanning electron micrograph of cancer cells from human colon. — Stock Photo
    Colored scanning electron micrograph of cancer cells from human colon.
    Neutrophil white blood cell and red blood cells, digital illustration. — Stock Photo
    Neutrophil white blood cell and red blood cells, digital illustration.
    Surface of a fallopian tube — Stock Photo
    Surface of a fallopian tube
    Light micrograph of cardiac callosity. Haematoxylin and eosin stain. — Stock Photo
    Light micrograph of cardiac callosity. Haematoxylin and eosin stain.
    Finger-like projections of the duodenum — Stock Photo
    Finger-like projections of the duodenum
    Grey matter of the cerebellum — Stock Photo
    Grey matter of the cerebellum
    Nerve. Coloured scanning electron micrograph (SEM) of a freeze-fracture through a peripheral nerve. Schwann cells wraps their cell membrane around the nerve a number of times — Stock Photo
    Nerve. Coloured scanning electron micrograph (SEM) of a freeze-fracture through a peripheral nerve. Schwann cells wraps their cell membrane around the nerve a number of times
    Light micrograph of plant cells. Plant cells have cell walls, constructed outside the cell membrane and composed of cellulose, hemicelluloses, and pectin. — Stock Photo
    Light micrograph of plant cells. Plant cells have cell walls, constructed outside the cell membrane and composed of cellulose, hemicelluloses, and pectin.
    Coloured scanning electron micrograph of ovarian cancer cells. — Stock Photo
    Coloured scanning electron micrograph of ovarian cancer cells.
    Abstract group of particles of viruses, computer illustration. — Stock Photo
    Abstract group of particles of viruses, computer illustration.
    Illustration of human kidney and light micrograph of section with glomerulus. — Stock Photo
    Illustration of human kidney and light micrograph of section with glomerulus.
    Red blood cells in blood vessel, digital illustration. — Stock Photo
    Red blood cells in blood vessel, digital illustration.
    Healthy red blood cells — Stock Photo
    Healthy red blood cells
    Illustration of sphere vesicles transporting along microtubule by kinesin proteins. — Stock Photo
    Illustration of sphere vesicles transporting along microtubule by kinesin proteins.
    Sporangium fungal cell with spores — Stock Photo
    Sporangium fungal cell with spores
    Illustration of flowing human blood cells. — Stock Photo
    Illustration of flowing human blood cells.
    Trachea (wind pipe) lining, coloured scanning electron micrograph (SEM). — Stock Photo
    Trachea (wind pipe) lining, coloured scanning electron micrograph (SEM).
    Human smooth muscle, light micrograph. — Stock Photo
    Human smooth muscle, light micrograph.
    Colored scanning electron micrograph of immature pig sperm from epididymis. — Stock Photo
    Colored scanning electron micrograph of immature pig sperm from epididymis.
    Fat (adipose) tissue, coloured scanning electron micrograph (SEM). The fat cells (adipocytes, round) are surrounded by collagen fibres. — Stock Photo
    Fat (adipose) tissue, coloured scanning electron micrograph (SEM). The fat cells (adipocytes, round) are surrounded by collagen fibres.
    Coloured scanning electron micrograph (SEM) of a freeze fracture of the vagina showing the stratified squamous epithelium and the underlying lamina propria — Stock Photo
    Coloured scanning electron micrograph (SEM) of a freeze fracture of the vagina showing the stratified squamous epithelium and the underlying lamina propria
    Simple columnar epithelium, digital illustration. — Stock Photo
    Simple columnar epithelium, digital illustration.
    Pancreatic islet cells. Colored transmission electron micrograph (TEM) of a section through pancreas tissue, showing cells known as Islets of Langerhans. These cells occur in distinct ovoid clusters numbering about 1 million in humans — Stock Photo
    Pancreatic islet cells. Colored transmission electron micrograph (TEM) of a section through pancreas tissue, showing cells known as Islets of Langerhans. These cells occur in distinct ovoid clusters numbering about 1 million in humans
    Human red blood cells — Stock Photo
    Human red blood cells
    Antibodies attacking virus particles, computer illustration. — Stock Photo
    Antibodies attacking virus particles, computer illustration.
    Normal White blood cell — Stock Photo
    Normal White blood cell
    Visual rendering of Human cells — Stock Photo
    Visual rendering of Human cells
    Abstract structure of neural network on dark background, digital illustration. — Stock Photo
    Abstract structure of neural network on dark background, digital illustration.
    Flu viruses, computer illustration — Stock Photo
    Flu viruses, computer illustration
    Bottlebrush pollen grain — Stock Photo
    Bottlebrush pollen grain
    Stomach cancer cell, computer illustration — Stock Photo
    Stomach cancer cell, computer illustration
    Cells of brewer yeast — Stock Photo
    Cells of brewer yeast
    Artwork of human fertilization — Stock Photo
    Artwork of human fertilization
    Various normal bacteria in human intestine, digital illustration. — Stock Photo
    Various normal bacteria in human intestine, digital illustration.
    Enzymes on plain background, digital illustration. — Stock Photo
    Enzymes on plain background, digital illustration.
    Illustration of human egg cell and sperm on blue background. — Stock Photo
    Illustration of human egg cell and sperm on blue background.
    Bacterial encephalitis. Conceptual computer illustration showing bacteria infecting brain cells — Stock Photo
    Bacterial encephalitis. Conceptual computer illustration showing bacteria infecting brain cells
    Active CAR T-cells cancer immunotherapy, medical illustration. — Stock Photo
    Active CAR T-cells cancer immunotherapy, medical illustration.
    West Nile virus particles — Stock Photo
    West Nile virus particles
    Nanomachines working on red blood cells, digital illustration. — Stock Photo
    Nanomachines working on red blood cells, digital illustration.
    Red blood cells in the bloodstream — Stock Photo
    Red blood cells in the bloodstream
    Red blood cells, digital illustration. — Stock Photo
    Red blood cells, digital illustration.
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Macrophage foam cells with lipid droplets, digital illustration. — Stock Photo
    Macrophage foam cells with lipid droplets, digital illustration.