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    Colored scanning electron micrograph of breast cancer cell. — Stock Photo
    Colored scanning electron micrograph of breast cancer cell.
    Red blood cells — Stock Photo
    Red blood cells
    Root vascular tissue, light micrograph. — Stock Photo
    Root vascular tissue, light micrograph.
    Paramecium ciliate protozoan — Stock Photo
    Paramecium ciliate protozoan
    Colored scanning electron micrograph of pollen grain cell from hollyhock hibiscus flower. — Stock Photo
    Colored scanning electron micrograph of pollen grain cell from hollyhock hibiscus flower.
    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.
    Light micrograph of necrotic oesophagitis. Haematoxylin and eosin stain. — Stock Photo
    Light micrograph of necrotic oesophagitis. Haematoxylin and eosin stain.
    Lobar pneumonia in stage of red hepatisation, digital illustration and light micrograph. — Stock Photo
    Lobar pneumonia in stage of red hepatisation, digital illustration and light micrograph.
    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
    Silica wall of a diatom — Stock Photo
    Silica wall of a diatom
    Red blood cells with fibrin — Stock Photo
    Red blood cells with fibrin
    Colored digital illustration of parasitic dust mites. — Stock Photo
    Colored digital illustration of parasitic dust mites.
    Activated platelet from peripheral blood — Stock Photo
    Activated platelet from peripheral blood
    Gum tissue with gingivitis — Stock Photo
    Gum tissue with gingivitis
    Ovarian cancer cells, coloured scanning electron micrograph. — Stock Photo
    Ovarian cancer cells, coloured scanning electron micrograph.
    Respiratory syncytial virus — Stock Photo
    Respiratory syncytial virus
    Chrysanthemum flower bud, light micrograph. — Stock Photo
    Chrysanthemum flower bud, light micrograph.
    Human eyelash mites — Stock Photo
    Human eyelash mites
    Colored digital illustration of parasitic dust mites. — Stock Photo
    Colored digital illustration of parasitic dust mites.
    Skin cancer cell — Stock Photo
    Skin cancer cell
    Skimmia sp. pollen grain — Stock Photo
    Skimmia sp. pollen grain
    Stomach surface epithelium, light micrograph (LM). The surface epithelium of the stomach is a simple columnar epithelium formed by tall mucous cells that invaginate to form the gastric pits — Stock Photo
    Stomach surface epithelium, light micrograph (LM). The surface epithelium of the stomach is a simple columnar epithelium formed by tall mucous cells that invaginate to form the gastric pits
    Liver cirrhosis. Computer illustration and light micrograph of a section through a human liver with from primary biliary cirrhosis. Cirrhosis is a disease in which bands of fibrosis (internal scarring) break up the internal structure of the liver — Stock Photo
    Liver cirrhosis. Computer illustration and light micrograph of a section through a human liver with from primary biliary cirrhosis. Cirrhosis is a disease in which bands of fibrosis (internal scarring) break up the internal structure of the liver
    Oesophageal cancer, computer illustration and light micrograph of cancer tissue. — Stock Photo
    Oesophageal cancer, computer illustration and light micrograph of cancer tissue.
    Lymphocyte white blood cell — Stock Photo
    Lymphocyte white blood cell
    Coloured scanning electron micrograph of osteocyte bone cell surrounded by bone tissue. — Stock Photo
    Coloured scanning electron micrograph of osteocyte bone cell surrounded by bone tissue.
    Composite image of nasal epithelium and pollen. Coloured Scanning Electron Micrograph (SEM) of the surface of nasal epithelium with inhaled in pollen. — Stock Photo
    Composite image of nasal epithelium and pollen. Coloured Scanning Electron Micrograph (SEM) of the surface of nasal epithelium with inhaled in pollen.
    Immature dog sperm — Stock Photo
    Immature dog sperm
    Sarcoptic mange mites eggs — Stock Photo
    Sarcoptic mange mites eggs
    Pseudomonas aeruginosa bacteria — Stock Photo
    Pseudomonas aeruginosa bacteria
    Paramecium sp. ciliate protozoa — Stock Photo
    Paramecium sp. ciliate protozoa
    Lung cancer, digital illustration and light micrograph of cancerous tissue. — Stock Photo
    Lung cancer, digital illustration and light micrograph of cancerous tissue.
    Light micrograph of a longitudinal section through a male pine cone showing the pollen (yellow). — Stock Photo
    Light micrograph of a longitudinal section through a male pine cone showing the pollen (yellow).
    Fly head anatomy — Stock Photo
    Fly head anatomy
    Kidney glomeruli. Coloured scanning electron micrograph (SEM) of a resin cast of glomeruli capillaries and the larger blood vessels supplying them with blood — Stock Photo
    Kidney glomeruli. Coloured scanning electron micrograph (SEM) of a resin cast of glomeruli capillaries and the larger blood vessels supplying them with blood
    Schizosaccharomyces pombe yeast — Stock Photo
    Schizosaccharomyces pombe yeast
    Fungal cells with sporangia and spores — Stock Photo
    Fungal cells with sporangia and spores
    Woodland skipper butterfly compound eye — Stock Photo
    Woodland skipper butterfly compound eye
    Colored scanning electron micrograph showing urethral epithelium of urethra. — Stock Photo
    Colored scanning electron micrograph showing urethral epithelium of urethra.
    Paramecium ciliate protozoan — Stock Photo
    Paramecium ciliate protozoan
    Diatoms. Coloured scanning electron micrograph (SEM) of Campylodiscus species diatoms. The diatoms are a group of photosynthetic, single-celled algae containing about 100, 000 species — Stock Photo
    Diatoms. Coloured scanning electron micrograph (SEM) of Campylodiscus species diatoms. The diatoms are a group of photosynthetic, single-celled algae containing about 100, 000 species
    Escherichia coli bacteria — Stock Photo
    Escherichia coli bacteria
    House dust mites — Stock Photo
    House dust mites
    Coloured scanning electron micrograph of breast cancer cells. — Stock Photo
    Coloured scanning electron micrograph of breast cancer cells.
    Diatom eukaryotic algae — Stock Photo
    Diatom eukaryotic algae
    Epithelium of a foliate papillae of the tongue — Stock Photo
    Epithelium of a foliate papillae of the tongue
    Dental plaque scanning electron micrograph — Stock Photo
    Dental plaque scanning electron micrograph
    Red and white blood cells aggregating — Stock Photo
    Red and white blood cells aggregating
    Colon cancer, digital illustration and light micrograph showing colon adenocarcinoma. — Stock Photo
    Colon cancer, digital illustration and light micrograph showing colon adenocarcinoma.
    Haversian canals in compact bone, light micrograph. — Stock Photo
    Haversian canals in compact bone, light micrograph.
    Light micrograph of red blood cells (erythrocytes, red) in a blood vessel. — Stock Photo
    Light micrograph of red blood cells (erythrocytes, red) in a blood vessel.
    Human stomach adenocarcinoma, computer illustration and light micrograph. — Stock Photo
    Human stomach adenocarcinoma, computer illustration and light micrograph.
    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).
    Elm stem. Light micrograph (LM) of cross-section through woody stem of elm (Ulmus procera) tree. — Stock Photo
    Elm stem. Light micrograph (LM) of cross-section through woody stem of elm (Ulmus procera) tree.
    Coloured scanning electron micrograph (SEM) of a freeze-fractured Nasturtium stem, showing numerous vascular bundles (such as at upper centre) with an inner xylem (pink) and outer phloem (yellow). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a freeze-fractured Nasturtium stem, showing numerous vascular bundles (such as at upper centre) with an inner xylem (pink) and outer phloem (yellow).
    Cells undergoing mitosis — Stock Photo
    Cells undergoing mitosis
    Woodland skipper butterfly — Stock Photo
    Woodland skipper butterfly
    Coloured scanning electron micrograph of the rod-shaped, Gram-negative bacteria Escherichia coli, commonly known as E. coli — Stock Photo
    Coloured scanning electron micrograph of the rod-shaped, Gram-negative bacteria Escherichia coli, commonly known as E. coli
    Peripheral nerve. Coloured transmission electron micrograph (TEM) of a section through a small peripheral nerve. Myelin( brown) is an insulating fatty layer that surrounds the myelinated nerve fibres (cyan) — Stock Photo
    Peripheral nerve. Coloured transmission electron micrograph (TEM) of a section through a small peripheral nerve. Myelin( brown) is an insulating fatty layer that surrounds the myelinated nerve fibres (cyan)
    Escherichia coli bacteria — Stock Photo
    Escherichia coli bacteria