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    Elementary age boy lying on grass and playing handheld electronic game. — Stock Photo
    Elementary age boy lying on grass and playing handheld electronic game.
    Pacemaker in heart disease — Stock Photo
    Pacemaker in heart disease
    Staphylococcus aureus coccoid bacteria, colored scanning electron micrograph. — Stock Photo
    Staphylococcus aureus coccoid bacteria, colored scanning electron micrograph.
    Coloured scanning electron micrograph (SEM) of a section through a foetal olfactory (smelling) sense organ known as the vomeronasal organ (VNO), or Jacobson organ. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a section through a foetal olfactory (smelling) sense organ known as the vomeronasal organ (VNO), or Jacobson organ.
    Components of house dust — Stock Photo
    Components of house dust
    Fungal cells and sporangia — Stock Photo
    Fungal cells and sporangia
    Teenage girl musicians recording music in sound booth — Stock Photo
    Teenage girl musicians recording music in sound booth
    Leech, coloured scanning electron micrograph (SEM). — Stock Photo
    Leech, coloured scanning electron micrograph (SEM).
    Coloured scanning electron micrograph of bacteria on surface of human tongue. — Stock Photo
    Coloured scanning electron micrograph of bacteria on surface of human tongue.
    Tendon, coloured scanning electron micrograph (SEM), showing bundles of collagen fibres. The parallel alignment of the fibres make tendons inelastic but flexible. Tendons attach muscle to bone. Magnification: x5000 when printed at 10 centimetres wide — Stock Photo
    Tendon, coloured scanning electron micrograph (SEM), showing bundles of collagen fibres. The parallel alignment of the fibres make tendons inelastic but flexible. Tendons attach muscle to bone. Magnification: x5000 when printed at 10 centimetres wide
    Man using credit card and laptop computer shopping online at home — Stock Photo
    Man using credit card and laptop computer shopping online at home
    Staphylococcus bacteria cluster — Stock Photo
    Staphylococcus bacteria cluster
    Coloured scanning electron micrograph of macrophage white blood cell. — Stock Photo
    Coloured scanning electron micrograph of macrophage white blood cell.
    Bacillus megaterium bacterial colony, coloured scanning electron micrograph. — Stock Photo
    Bacillus megaterium bacterial colony, coloured scanning electron micrograph.
    Solar panels against blue sky with white clouds — Stock Photo
    Solar panels against blue sky with white clouds
    Abstract coloured scanning electron micrograph of crystalline surface of fractured gallstone. — Stock Photo
    Abstract coloured scanning electron micrograph of crystalline surface of fractured gallstone.
    Businessman standing in conference room — Stock Photo
    Businessman standing in conference room
    Teenage girls using cell phone and digital tablets — Stock Photo
    Teenage girls using cell phone and digital tablets
    Waiting area and reception desk at a modern hospital, with signs and electronic display Yellow bag. — Stock Photo
    Waiting area and reception desk at a modern hospital, with signs and electronic display Yellow bag.
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is red. Mitochondria (orange) in the cell's cytoplasm produce energy for the cell. Lysosomes (black) contain enzymes for digesting foreign particles. — Stock Photo
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is red. Mitochondria (orange) in the cell's cytoplasm produce energy for the cell. Lysosomes (black) contain enzymes for digesting foreign particles.
    Blonde woman using digital tablet in cafe — Stock Photo
    Blonde woman using digital tablet in cafe
    Happy senior couple using digital tablet on porch — Stock Photo
    Happy senior couple using digital tablet on porch
    Human cell infected with Simian Immunodeficiency Virus from sooty mangabey, colored scanning electron micrograph. — Stock Photo
    Human cell infected with Simian Immunodeficiency Virus from sooty mangabey, colored scanning electron micrograph.
    Red blood cells and platelets — Stock Photo
    Red blood cells and platelets
    Young woman inserting paper and pens into plotter in laboratory. — Stock Photo
    Young woman inserting paper and pens into plotter in laboratory.
    Illustration of abstract cancer cell with tentacles. — Stock Photo
    Illustration of abstract cancer cell with tentacles.
    Electronic repairing equipment in service centre — Stock Photo
    Electronic repairing equipment in service centre
    Colored scanning electron micrograph of Streptococcus mutans anaerobic bacteria in normal bacteria flora of mouth. — Stock Photo
    Colored scanning electron micrograph of Streptococcus mutans anaerobic bacteria in normal bacteria flora of mouth.
    Close up of a child pointing at electronic tablet at home — Stock Photo
    Close up of a child pointing at electronic tablet at home
    Eleven year-old bi-racial girl working on laptop on bed — Stock Photo
    Eleven year-old bi-racial girl working on laptop on bed
    Colorectal cancer cell dividing — Stock Photo
    Colorectal cancer cell dividing
    Cable boxes and electric meter — Stock Photo
    Cable boxes and electric meter
    Influenza viruses and host cell — Stock Photo
    Influenza viruses and host cell
    Coloured scanning electron micrograph (SEM) of a tumour cell, showing pseudopodia protrusions (bottom left and right), a prominent feature of actively motile cells. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a tumour cell, showing pseudopodia protrusions (bottom left and right), a prominent feature of actively motile cells.
    Epithelium from a fallopian tube — Stock Photo
    Epithelium from a fallopian tube
    Kidney glomerulus and podocyte cells — Stock Photo
    Kidney glomerulus and podocyte cells
    Coxsackie viruse particles. — Stock Photo
    Coxsackie viruse particles.
    Tendon, coloured scanning electron micrograph showing bundles of collagen fibres. — Stock Photo
    Tendon, coloured scanning electron micrograph showing bundles of collagen fibres.
    Feet bacteria. Coloured scanning electron micrograph (SEM) of bacteria cultured from between toes of foot — Stock Photo
    Feet bacteria. Coloured scanning electron micrograph (SEM) of bacteria cultured from between toes of foot
    Girl using digital tablet in airport departure area — Stock Photo
    Girl using digital tablet in airport departure area
    Cat flea head — Stock Photo
    Cat flea head
    Escherichia coli bacteria — Stock Photo
    Escherichia coli bacteria
    Smooth hawksbeard (Crepis capillaris) seed, coloured scanning electron micrograph (SEM). — Stock Photo
    Smooth hawksbeard (Crepis capillaris) seed, coloured scanning electron micrograph (SEM).
    Methicillin-resistant Staphylococcus aureus — Stock Photo
    Methicillin-resistant Staphylococcus aureus
    Young couple looking at mobile while having fun — Stock Photo
    Young couple looking at mobile while having fun
    Arachnoidiscus sp. diatom algae — Stock Photo
    Arachnoidiscus sp. diatom algae
    Couple paying bills online, using fingerprint log on at digital tablet — Stock Photo
    Couple paying bills online, using fingerprint log on at digital tablet
    Chinese hibiscus pollen — Stock Photo
    Chinese hibiscus pollen
    Activated T lymphocytes and red blood cells on scanning electron micrograph. — Stock Photo
    Activated T lymphocytes and red blood cells on scanning electron micrograph.
    Coloured scanning electron micrograph (SEM) of the surface of a tomato leaf. — Stock Photo
    Coloured scanning electron micrograph (SEM) of the surface of a tomato leaf.
    Bird bone tissue — Stock Photo
    Bird bone tissue
    Puffball fungus spores — Stock Photo
    Puffball fungus spores
    Coloured scanning electron micrograph (SEM) of a section through fractured skeletal muscle to show large muscle bundles, or fascicles (green), surrounded by perimysium connective tissue (pink). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a section through fractured skeletal muscle to show large muscle bundles, or fascicles (green), surrounded by perimysium connective tissue (pink).
    Red blood cells — Stock Photo
    Red blood cells
    Surface of a fallopian tube — Stock Photo
    Surface of a fallopian tube
    Chinese couple choosing multicooker in electronics store — Stock Photo
    Chinese couple choosing multicooker in electronics store
    Brother and sister using digital tablet in airport departure area — Stock Photo
    Brother and sister using digital tablet in airport departure area
    Multi-generation men reading on bench — Stock Photo
    Multi-generation men reading on bench
    Bacillus megaterium bacterial colony, coloured scanning electron micrograph. — Stock Photo
    Bacillus megaterium bacterial colony, coloured scanning electron micrograph.
    Contemporary professional microscope with powerful lenses placed on table in modern equipped lab — Stock Photo
    Contemporary professional microscope with powerful lenses placed on table in modern equipped lab