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    Human red blood cells — Stock Photo
    Human red blood cells
    Digital illustration of multiple threadworms in human intestine. — Stock Photo
    Digital illustration of multiple threadworms in human intestine.
    Previously burnt sub-alpine forest rebounding in summer with lodge-pole pines and variety of wildflowers, yarrow, aster, arnica and corn lilies. — Stock Photo
    Previously burnt sub-alpine forest rebounding in summer with lodge-pole pines and variety of wildflowers, yarrow, aster, arnica and corn lilies.
    Normal elbow joint anatomy — Stock Photo
    Normal elbow joint anatomy
    Scorpion fly foot — Stock Photo
    Scorpion fly foot
    X-ray showing a fractured tibia — Stock Photo
    X-ray showing a fractured tibia
    Trendy homosexual man with long nails in ornamental shirt looking at camera while squatting on pavement against wall — Stock Photo
    Trendy homosexual man with long nails in ornamental shirt looking at camera while squatting on pavement against wall
    Alveolar macrophage phagocytosis of E. coli — Stock Photo
    Alveolar macrophage phagocytosis of E. coli
    Bougainvillea pollen grain — Stock Photo
    Bougainvillea pollen grain
    Coloured scanning electron micrograph of cancer cell from human colon. — Stock Photo
    Coloured scanning electron micrograph of cancer cell from human colon.
    Knee of obese patient with arthritis — Stock Photo
    Knee of obese patient with arthritis
    Escherichia coli bacteria — Stock Photo
    Escherichia coli bacteria
    Men shooting at target — Stock Photo
    Men shooting at target
    Hair follicles. Coloured scanning electron micrograph (SEM). The outer layer of hair (the cuticle) has overlapping scales of keratin. These scales are thought to prevent hairs from matting together — Stock Photo
    Hair follicles. Coloured scanning electron micrograph (SEM). The outer layer of hair (the cuticle) has overlapping scales of keratin. These scales are thought to prevent hairs from matting together
    Cilia covering the epithelial lining of the nasopharyx — Stock Photo
    Cilia covering the epithelial lining of the nasopharyx
    Low angle of happy African American woman with dreadlocks and bearded man smiling and brushing false teeth during work in lab — Stock Photo
    Low angle of happy African American woman with dreadlocks and bearded man smiling and brushing false teeth during work in lab
    Helicobacter pylori bacterium — Stock Photo
    Helicobacter pylori bacterium
    Osteoblasts. Colored transmission electron micrograph (TEM) of osteoblasts, bone-producing cells (purple and pink). They contain rough endoplasmic reticulum (RER), which produces, modifies and transports proteins, and nucleus — Stock Photo
    Osteoblasts. Colored transmission electron micrograph (TEM) of osteoblasts, bone-producing cells (purple and pink). They contain rough endoplasmic reticulum (RER), which produces, modifies and transports proteins, and nucleus
    Degenerative foot deformation — Stock Photo
    Degenerative foot deformation
    Tumour affecting the pituitary gland — Stock Photo
    Tumour affecting the pituitary gland
    Scanning electron micrograph of bacterial culture from sputum. — Stock Photo
    Scanning electron micrograph of bacterial culture from sputum.
    Black colleagues examining denture in laboratory — Stock Photo
    Black colleagues examining denture in laboratory
    B-lymphocyte white blood cells — Stock Photo
    B-lymphocyte white blood cells
    Normal skull structure of young adult — Stock Photo
    Normal skull structure of young adult
    Healthy lungs of a 30 year old patient — Stock Photo
    Healthy lungs of a 30 year old patient
    Coloured scanning electron micrograph of bacteria cultured from mobile phone. — Stock Photo
    Coloured scanning electron micrograph of bacteria cultured from mobile phone.
    Mature virus and budding release of HIV — Stock Photo
    Mature virus and budding release of HIV
    Closeup of a denture in a laboratory — Stock Photo
    Closeup of a denture in a laboratory
    Campylobacter jejuni bacteria — Stock Photo
    Campylobacter jejuni bacteria
    Coloured scanning electron micrograph (SEM) of a fractured mucous membrane of the trachea (wind pipe), showing the epithelium and underlying connective tissue. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a fractured mucous membrane of the trachea (wind pipe), showing the epithelium and underlying connective tissue.
    Streptococcus thermophilus bacteria — Stock Photo
    Streptococcus thermophilus bacteria
    Blood clotting in an ovarian follicle — Stock Photo
    Blood clotting in an ovarian follicle
    Ovarian cancer cells, coloured scanning electron micrograph. — Stock Photo
    Ovarian cancer cells, coloured scanning electron micrograph.
    Coloured computed tomography (CT) scan of a section through the chest of a 76-year-old male patient with a malignant (cancerous) tumour (bright, right) of the bronchus. — Stock Photo
    Coloured computed tomography (CT) scan of a section through the chest of a 76-year-old male patient with a malignant (cancerous) tumour (bright, right) of the bronchus.
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is blue. Mitochondria (cyan)) in the cell's cytoplasm produce energy for the cell. Lysosomes (red) contain enzymes for digesting foreign particles. M — Stock Photo
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is blue. Mitochondria (cyan)) in the cell's cytoplasm produce energy for the cell. Lysosomes (red) contain enzymes for digesting foreign particles. M
    Escherichia coli on the surface of human skin — Stock Photo
    Escherichia coli on the surface of human skin
    Elevated view of false capers made of nasturtium seeds — Stock Photo
    Elevated view of false capers made of nasturtium seeds
    Old church in English countryside — Stock Photo
    Old church in English countryside
    Blade of grass with a serrated edge — Stock Photo
    Blade of grass with a serrated edge
    Coloured scanning electron micrograph (SEM) of Table sugar (sucrose) crystals. — Stock Photo
    Coloured scanning electron micrograph (SEM) of Table sugar (sucrose) crystals.
    Colored X-ray of section through thoracic spine of senior male patient with ankylosing spondylitis with severe degeneration of lower thoracic spine. — Stock Photo
    Colored X-ray of section through thoracic spine of senior male patient with ankylosing spondylitis with severe degeneration of lower thoracic spine.
    Didinium sp. ciliate protozoa, coloured scanning electron micrograph (SEM). These tiny single-celled organisms are found in freshwater and marine habitats. They are predatory organism, feeding on other ciliate protozoans, mainly Paramecium — Stock Photo
    Didinium sp. ciliate protozoa, coloured scanning electron micrograph (SEM). These tiny single-celled organisms are found in freshwater and marine habitats. They are predatory organism, feeding on other ciliate protozoans, mainly Paramecium
    Colored scanning electron micrograph of osteosarcoma bone cancer cell. — Stock Photo
    Colored scanning electron micrograph of osteosarcoma bone cancer cell.
    Coloured scanning electron micrograph of bacteria from culture of breast milk. — Stock Photo
    Coloured scanning electron micrograph of bacteria from culture of breast milk.
    Earthworm coloured scanning electron micrograph — Stock Photo
    Earthworm coloured scanning electron micrograph
    Old church in English countryside — Stock Photo
    Old church in English countryside
    Clownfish swimming among tentacles of anemone — Stock Photo
    Clownfish swimming among tentacles of anemone
    Striated muscle. Coloured transmission electron micrograph (TEM) of a longitudinal section through striated skeletal muscle. The striated banding-pattern of the muscle fibrils is seen — Stock Photo
    Striated muscle. Coloured transmission electron micrograph (TEM) of a longitudinal section through striated skeletal muscle. The striated banding-pattern of the muscle fibrils is seen
    White blood cell — Stock Photo
    White blood cell
    Colored scanning electron micrograph of stem cell-derived motor neuron cell. — Stock Photo
    Colored scanning electron micrograph of stem cell-derived motor neuron cell.
    Protozoan infection in human intestinal lumen — Stock Photo
    Protozoan infection in human intestinal lumen
    Ovarian cancer cells, coloured scanning electron micrograph. — Stock Photo
    Ovarian cancer cells, coloured scanning electron micrograph.
    Fungal cells with sporangia and spores — Stock Photo
    Fungal cells with sporangia and spores
    Normal ankle joint, coloured profile X-ray. — Stock Photo
    Normal ankle joint, coloured profile X-ray.
    Blood clot structure — Stock Photo
    Blood clot structure
    Coloured profile computed tomography (CT) scan of the healthy torso of a 60 year old patient. — Stock Photo
    Coloured profile computed tomography (CT) scan of the healthy torso of a 60 year old patient.
    Deformed sperm cell — Stock Photo
    Deformed sperm cell
    Man holding fresh caught false albacore tuna on boat — Stock Photo
    Man holding fresh caught false albacore tuna on boat
    Pyoderma skin disease — Stock Photo
    Pyoderma skin disease
    Acinar pancreatic cell — Stock Photo
    Acinar pancreatic cell