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    Cell layers of the retina — Stock Photo
    Cell layers of the retina
    Abstract Biotechnology, conceptual illustration. — Stock Photo
    Abstract Biotechnology, conceptual illustration.
    Nerve cells and intercellular junctions — Stock Photo
    Nerve cells and intercellular junctions
    HIV viruses infecting T-lymphocyte cell — Stock Photo
    HIV viruses infecting T-lymphocyte cell
    Plasmodium malariae protozoa in blood vessel, computer illustration. — Stock Photo
    Plasmodium malariae protozoa in blood vessel, computer illustration.
    Abstract pink colored cancer cell on black background, digital illustration. — Stock Photo
    Abstract pink colored cancer cell on black background, digital illustration.
    Leucocyte cell capturing harmful bacteria, computer illustration. — Stock Photo
    Leucocyte cell capturing harmful bacteria, computer illustration.
    Myelinated nerve fibres — Stock Photo
    Myelinated nerve fibres
    Close-up of technician carrying equipment and solution in sterile laboratory. — Stock Photo
    Close-up of technician carrying equipment and solution in sterile laboratory.
    Closeup of Microbe, conceptual illustration — Stock Photo
    Closeup of Microbe, conceptual illustration
    Virus particles spreading through blood stream — Stock Photo
    Virus particles spreading through blood stream
    Illustration of 8 cell stage egg on blue background. — Stock Photo
    Illustration of 8 cell stage egg on blue background.
    Sporangium fungal cell with spores — Stock Photo
    Sporangium fungal cell with spores
    Human sperm cells — Stock Photo
    Human sperm cells
    Human embryonic stem cells in Petri dish, digital illustration. — Stock Photo
    Human embryonic stem cells in Petri dish, digital illustration.
    Common house dust mite — Stock Photo
    Common house dust mite
    Platelets in human blood, computer illustration. — Stock Photo
    Platelets in human blood, computer illustration.
    Cancer cell, computer illustration — Stock Photo
    Cancer cell, computer illustration
    Dopaminergic neuron brain cells, digital illustration. — Stock Photo
    Dopaminergic neuron brain cells, digital illustration.
    Destruction of cancer cell, digital conceptual illustration illustrating treatment of cancer by drugs, nanoparticles and antibodies. — Stock Photo
    Destruction of cancer cell, digital conceptual illustration illustrating treatment of cancer by drugs, nanoparticles and antibodies.
    3d illustration of in vitro fertilization of egg cell. — Stock Photo
    3d illustration of in vitro fertilization of egg cell.
    Colored illustration showing abundant lymphoblast cells in human bone marrow smear in acute lymphoblastic leukaemia. — Stock Photo
    Colored illustration showing abundant lymphoblast cells in human bone marrow smear in acute lymphoblastic leukaemia.
    Fatcells structure and anatomy — Stock Photo
    Fatcells structure and anatomy
    Virus particles spreading through blood stream — Stock Photo
    Virus particles spreading through blood stream
    Primula pollen grain — Stock Photo
    Primula pollen grain
    Lining of the small intestine — Stock Photo
    Lining of the small intestine
    Illustration of eosinophil white blood cell with purple lobed nuclei. — Stock Photo
    Illustration of eosinophil white blood cell with purple lobed nuclei.
    Sperm fertilizing an egg cell — Stock Photo
    Sperm fertilizing an egg cell
    Nanoparticles in blood — Stock Photo
    Nanoparticles in blood
    Dog hair, coloured scanning electron micrograph (SEM). — Stock Photo
    Dog hair, coloured scanning electron micrograph (SEM).
    From above cropped unrecognizable doctor hand injecting ovum on Petri dish and examining cell through microscope in laboratory of modern fertility clinic — Stock Photo
    From above cropped unrecognizable doctor hand injecting ovum on Petri dish and examining cell through microscope in laboratory of modern fertility clinic
    Pollen threads and brochosomes — Stock Photo
    Pollen threads and brochosomes
    Abstract animal cells, digital illustration. — Stock Photo
    Abstract animal cells, digital illustration.
    Geranium sp. pollen grain — Stock Photo
    Geranium sp. pollen grain
    3d illustration of cross-section of hepatitis pathogen with DNA, cell nucleus and receptors. — Stock Photo
    3d illustration of cross-section of hepatitis pathogen with DNA, cell nucleus and receptors.
    Virus in human blood, computer illustration. — Stock Photo
    Virus in human blood, computer illustration.
    In vitro fertilisation process — Stock Photo
    In vitro fertilisation process
    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).
    Antibiotic resistant Pseudomonas aeruginosa bacterium, digital 3d illustration. — Stock Photo
    Antibiotic resistant Pseudomonas aeruginosa bacterium, digital 3d illustration.
    T-cell attached to cancer cell — Stock Photo
    T-cell attached to cancer cell
    Structure of neutrophil white blood cell, digital illustration. — Stock Photo
    Structure of neutrophil white blood cell, digital illustration.
    Helicobacter pylori bacteria — Stock Photo
    Helicobacter pylori bacteria
    Nerves synapse, biological digital illustration. — Stock Photo
    Nerves synapse, biological digital illustration.
    Abstract green colored cancer cells on tissue, digital illustration. — Stock Photo
    Abstract green colored cancer cells on tissue, digital illustration.
    Thyroid gland cancer with closeup view of cancer cells, computer illustration. — Stock Photo
    Thyroid gland cancer with closeup view of cancer cells, computer illustration.
    Sunflower pollen structure — Stock Photo
    Sunflower pollen structure
    Basophil white blood cell, digital illustration. — Stock Photo
    Basophil white blood cell, digital illustration.
    Digital illustration of Neisseria gonorrhoeae bacteria inside neutrophil blood cells. — Stock Photo
    Digital illustration of Neisseria gonorrhoeae bacteria inside neutrophil blood cells.
    3d illustration of internal structure of human cell. — Stock Photo
    3d illustration of internal structure of human cell.
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Digital illustration of pyramidal nerve cells from cerebral cortex of brain. — Stock Photo
    Digital illustration of pyramidal nerve cells from cerebral cortex of brain.
    Digital illustration of trophozoite form of Acanthamoeba castellanii amoeba. — Stock Photo
    Digital illustration of trophozoite form of Acanthamoeba castellanii amoeba.
    Structure of animal cell — Stock Photo
    Structure of animal cell
    Onion cells undergoing mitosis — Stock Photo
    Onion cells undergoing mitosis
    Computer illustration of bacterium surrounded by neutrophil white blood cells. — Stock Photo
    Computer illustration of bacterium surrounded by neutrophil white blood cells.
    Scanning electron micrograph (SEM) of a PC12 neurone in culture. — Stock Photo
    Scanning electron micrograph (SEM) of a PC12 neurone in culture.
    3d illustration of cross-section of hepatitis pathogen with DNA, cell nucleus and receptors. — Stock Photo
    3d illustration of cross-section of hepatitis pathogen with DNA, cell nucleus and receptors.
    Female researcher using micropipette and tubes in laboratory, close-up. — Stock Photo
    Female researcher using micropipette and tubes in laboratory, close-up.
    3d illustration of a lysosome organelle within a eukaryotic cell. Lysosomes are enzyme-filled vesicles that break down waste material, foreign bodies and cellular debris. — Stock Photo
    3d illustration of a lysosome organelle within a eukaryotic cell. Lysosomes are enzyme-filled vesicles that break down waste material, foreign bodies and cellular debris.
    Influenza viruses and host cell — Stock Photo
    Influenza viruses and host cell