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    Syphilis ulcer on vulva — Stock Photo
    Syphilis ulcer on vulva
    Fat in blood cells blocking blood vessel, digital illustration. — Stock Photo
    Fat in blood cells blocking blood vessel, digital illustration.
    Fungal cells and sporangia — Stock Photo
    Fungal cells and sporangia
    Light micrograph of onion (Allium cepa) root tip cells undergoing mitosis (nuclear division). — Stock Photo
    Light micrograph of onion (Allium cepa) root tip cells undergoing mitosis (nuclear division).
    Fertilisation of egg cell with spermatozoa, digital illustration. — Stock Photo
    Fertilisation of egg cell with spermatozoa, digital illustration.
    Human cell, computer illustration — Stock Photo
    Human cell, computer illustration
    Digital illustration of balls of cholesterol lipids in blood vessel. — Stock Photo
    Digital illustration of balls of cholesterol lipids in blood vessel.
    Red and white blood cells — Stock Photo
    Red and white blood cells
    Close-up 3d illustration of blue cells pattern with red nuclei. — Stock Photo
    Close-up 3d illustration of blue cells pattern with red nuclei.
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    Heart capillary with red blood cell between muscle fibres, colored scanning electron micrograph. — Stock Photo
    Heart capillary with red blood cell between muscle fibres, colored scanning electron micrograph.
    Human Fertilisation, computer illustration — Stock Photo
    Human Fertilisation, computer illustration
    3d digital illustration of narrowed blood vessel. — Stock Photo
    3d digital illustration of narrowed blood vessel.
    Milkwort pollen grain — Stock Photo
    Milkwort pollen grain
    Secondary follicles in an ovary — Stock Photo
    Secondary follicles in an ovary
    Computer illustration of unicellular fungus (yeast) Candida auris — Stock Photo
    Computer illustration of unicellular fungus (yeast) Candida auris
    Protozoan Plasmodium malariae inside red blood cell in the schizont stage, computer illustration — Stock Photo
    Protozoan Plasmodium malariae inside red blood cell in the schizont stage, computer illustration
    Nerve cells and axon connections — Stock Photo
    Nerve cells and axon connections
    Fallopian tube cellular structure — Stock Photo
    Fallopian tube cellular structure
    Axon connections between cells — Stock Photo
    Axon connections between cells
    Blood cells, light micrograph. — Stock Photo
    Blood cells, light micrograph.
    Close-up of hand of cell biologist holding flask of stem cells cultivated in red growth medium. — Stock Photo
    Close-up of hand of cell biologist holding flask of stem cells cultivated in red growth medium.
    Closeup of abstract background with round shaped cells of vaccine of different sizes illuminated by colorful light — Stock Photo
    Closeup of abstract background with round shaped cells of vaccine of different sizes illuminated by colorful light
    3d illustration of sperm cells moving towards human womb. — Stock Photo
    3d illustration of sperm cells moving towards human womb.
    Fat in blood cells blocking blood vessel, digital illustration. — Stock Photo
    Fat in blood cells blocking blood vessel, digital illustration.
    Bone cancer cells. Coloured scanning electron micrograph of osteosarcoma cancer cells. Osteosarcoma is an aggressive malignant neoplasm arising from primitive transformed mesenchymal cells — Stock Photo
    Bone cancer cells. Coloured scanning electron micrograph of osteosarcoma cancer cells. Osteosarcoma is an aggressive malignant neoplasm arising from primitive transformed mesenchymal cells
    Medium tray with cells and DNA autoradiogram for scientific research. — Stock Photo
    Medium tray with cells and DNA autoradiogram for scientific research.
    Bacteria amidst blood cells in blood vessel, digital illustration. — Stock Photo
    Bacteria amidst blood cells in blood vessel, digital illustration.
    Colored virus particles, digital illustration — Stock Photo
    Colored virus particles, digital illustration
    Blood clot, computer illustration — Stock Photo
    Blood clot, computer illustration
    Digital illustration of green bacteria cells on white background. — Stock Photo
    Digital illustration of green bacteria cells on white background.
    Normal red blood cells — Stock Photo
    Normal red blood cells
    Abstract animal cells, digital illustration. — Stock Photo
    Abstract animal cells, digital illustration.
    Protozoa Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration. — Stock Photo
    Protozoa Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration.
    Pyramidal neurons (nerve cells) of human brain frontal cortex, computer illustration — Stock Photo
    Pyramidal neurons (nerve cells) of human brain frontal cortex, computer illustration
    16-cell morula embryo — Stock Photo
    16-cell morula embryo
    Plasmodium ovale protozoan parasites and red blood cell in flow, computer illustration. — Stock Photo
    Plasmodium ovale protozoan parasites and red blood cell in flow, computer illustration.
    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
    Digital illustration of pyramidal nerve cells from cerebral cortex of brain. — Stock Photo
    Digital illustration of pyramidal nerve cells from cerebral cortex of brain.
    Macrophage foam cells containing lipid droplets, digital illustration. — Stock Photo
    Macrophage foam cells containing lipid droplets, digital illustration.
    Measles virus particles budding from cells, digital illustration. — Stock Photo
    Measles virus particles budding from cells, digital illustration.
    Abstract 3d illustration of nerve cells with connections in human nervous system. — Stock Photo
    Abstract 3d illustration of nerve cells with connections in human nervous system.
    Digital illustration of Neisseria gonorrhoeae bacteria inside neutrophil white blood cells. — Stock Photo
    Digital illustration of Neisseria gonorrhoeae bacteria inside neutrophil white blood cells.
    Smear from oral cavity showing oral trichomonas and buccal epithelial cells, digital illustration. — Stock Photo
    Smear from oral cavity showing oral trichomonas and buccal epithelial cells, digital illustration.
    Daisy pollen grain — Stock Photo
    Daisy pollen grain
    Secondary follicles in an ovary — Stock Photo
    Secondary follicles in an ovary
    Virus particles spreading through blood stream — Stock Photo
    Virus particles spreading through blood stream
    Cryptococcus neoformans fungus, illustration. C. neoformans is a yeast-like fungus that reproduces by budding. An acidic mucopolysaccharide capsule completely encloses the fungus — Stock Photo
    Cryptococcus neoformans fungus, illustration. C. neoformans is a yeast-like fungus that reproduces by budding. An acidic mucopolysaccharide capsule completely encloses the fungus
    Zika virus particles transmitted by mosquito bite, digital illustration. — Stock Photo
    Zika virus particles transmitted by mosquito bite, digital illustration.
    Fibrosarcoma cells in late stage of mitosis — Stock Photo
    Fibrosarcoma cells in late stage of mitosis
    Sperm fertilising an egg — Stock Photo
    Sperm fertilising an egg
    Motor neurons, light micrograph. Motor neurons of the spinal cord are part of the central nervous system. Haematoxylin and eosin stain. — Stock Photo
    Motor neurons, light micrograph. Motor neurons of the spinal cord are part of the central nervous system. Haematoxylin and eosin stain.
    Complex mucosal folding of seminal vesicle — Stock Photo
    Complex mucosal folding of seminal vesicle
    Digital artwork of round transparent cells on plain background. — Stock Photo
    Digital artwork of round transparent cells on plain background.
    Cancer cell morphology — Stock Photo
    Cancer cell morphology
    Abstract green colored cancer cells on tissue, digital illustration. — Stock Photo
    Abstract green colored cancer cells on tissue, digital illustration.
    Plasmodium vivax protozoa inside blood vessel, digital illustration. — Stock Photo
    Plasmodium vivax protozoa inside blood vessel, digital illustration.
    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).
    Cancer cell, computer illustration. — Stock Photo
    Cancer cell, computer illustration.
    Colored scanning electron micrograph of resting T-lymphocytes from human blood sample. — Stock Photo
    Colored scanning electron micrograph of resting T-lymphocytes from human blood sample.