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    Primary ovarian follicle — Stock Photo
    Primary ovarian follicle
    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.
    Digital illustration of human nerve cell with dendrites. — Stock Photo
    Digital illustration of human nerve cell with dendrites.
    Human eye with muscles and circulatory system — Stock Photo
    Human eye with muscles and circulatory system
    Stomach cancer cell, computer illustration — Stock Photo
    Stomach cancer cell, computer illustration
    Conceptual 3d illustration of artificial insemination, in vitro fertilization of human egg cell. — Stock Photo
    Conceptual 3d illustration of artificial insemination, in vitro fertilization of human egg cell.
    Illustration of human nerve cell connections. — Stock Photo
    Illustration of human nerve cell connections.
    3d rendered illustration of human nerve cell on black background. — Stock Photo
    3d rendered illustration of human nerve cell on black background.
    Stomach cancer cell, computer illustration — Stock Photo
    Stomach cancer cell, computer illustration
    Conceptual 3d illustration of artificial insemination, in vitro fertilization of human egg cell. — Stock Photo
    Conceptual 3d illustration of artificial insemination, in vitro fertilization of human egg cell.
    Paramecium ciliate protozoan — Stock Photo
    Paramecium ciliate protozoan
    Atomic structure, computer illustration — Stock Photo
    Atomic structure, computer illustration
    Planets of the solar system — Stock Photo
    Planets of the solar system
    Digital illustration showing red blood cells, platelets, neutrophils, monocyte and lymphocytes in normal blood smear. — Stock Photo
    Digital illustration showing red blood cells, platelets, neutrophils, monocyte and lymphocytes in normal blood smear.
    Magnified digital illustration of megakaryocyte cell. — Stock Photo
    Magnified digital illustration of megakaryocyte cell.
    Carcinoma cell, coloured transmission electron micrograph (TEM). — Stock Photo
    Carcinoma cell, coloured transmission electron micrograph (TEM).
    Illustration of fertilized human egg cell. — Stock Photo
    Illustration of fertilized human egg cell.
    Magnified digital illustration of neutrophil cell. — Stock Photo
    Magnified digital illustration of neutrophil cell.
    Scientific illustration of influenza virus particle. — Stock Photo
    Scientific illustration of influenza virus particle.
    Microscopic colored view of a unipolar neuron — Stock Photo
    Microscopic colored view of a unipolar neuron
    Illustration of sperm around human egg cell. — Stock Photo
    Illustration of sperm around human egg cell.
    Illustration of giardia parasites on blue background. — Stock Photo
    Illustration of giardia parasites on blue background.
    Fat cells, computer illustration — Stock Photo
    Fat cells, computer illustration
    Animal cell with mitochondria, digital illustration. — Stock Photo
    Animal cell with mitochondria, digital illustration.
    3d rendered illustration of purple nerve cell. — Stock Photo
    3d rendered illustration of purple nerve cell.
    Abstract animal cells, digital illustration. — Stock Photo
    Abstract animal cells, digital illustration.
    Purple colored nerve cell on dark background, digital illustration. — Stock Photo
    Purple colored nerve cell on dark background, digital illustration.
    Human cell, computer illustration — Stock Photo
    Human cell, computer illustration
    Digital image of spiral Sculptor Galaxy. — Stock Photo
    Digital image of spiral Sculptor Galaxy.
    Layer of cells, computer illustration — Stock Photo
    Layer of cells, computer illustration
    3d illustration of the nucleus inside a eukaryotic cell. The nucleus contains the cell's genetic information in the form of DNA (deoxyribonucleic acid). The DNA is complexed with proteins and stored as chromatin — Stock Photo
    3d illustration of the nucleus inside a eukaryotic cell. The nucleus contains the cell's genetic information in the form of DNA (deoxyribonucleic acid). The DNA is complexed with proteins and stored as chromatin
    Digital illustration of human nerve cell with dendrites. — Stock Photo
    Digital illustration of human nerve cell with dendrites.
    Illustration of human egg cell on blue background. — Stock Photo
    Illustration of human egg cell on blue background.
    Illustration of 8 cell stage egg on blue background. — Stock Photo
    Illustration of 8 cell stage egg on blue background.
    Digital 3d colored illustration of cancer cell in process of mitosis. — Stock Photo
    Digital 3d colored illustration of cancer cell in process of mitosis.
    Supramedial eye anatomy showing muscle innervation — Stock Photo
    Supramedial eye anatomy showing muscle innervation
    Atom with nucleus, atomic shell and orbiting electrons on yellow background. — Stock Photo
    Atom with nucleus, atomic shell and orbiting electrons on yellow background.
    Illustration of healthy human nervous cell. — Stock Photo
    Illustration of healthy human nervous cell.
    Human cell, computer illustration — Stock Photo
    Human cell, computer illustration
    Starscape with spiral galaxy in Camelopardalis constellation — Stock Photo
    Starscape with spiral galaxy in Camelopardalis constellation
    Adipose tissue composed of adipocytes — Stock Photo
    Adipose tissue composed of adipocytes
    Cell division process — Stock Photo
    Cell division process
    Layer of cells, computer illustration — Stock Photo
    Layer of cells, computer illustration
    Cells undergoing mitosis — Stock Photo
    Cells undergoing mitosis
    Animal cells during cytokinesis (cell division), illustration — Stock Photo
    Animal cells during cytokinesis (cell division), illustration
    Fat cells, computer illustration — Stock Photo
    Fat cells, computer illustration
    Animal cells during cytokinesis (cell division), illustration — Stock Photo
    Animal cells during cytokinesis (cell division), illustration
    Caudate nuclei highlighted in the human brain, illustration. The caudate nucleus is a component of the basal ganglia, it is associated with motor processes and plays role in Huntington's and Parkinson's diseases. — Stock Photo
    Caudate nuclei highlighted in the human brain, illustration. The caudate nucleus is a component of the basal ganglia, it is associated with motor processes and plays role in Huntington's and Parkinson's diseases.
    Illustration of 4 cell stage egg on black background. — Stock Photo
    Illustration of 4 cell stage egg on black background.
    3d rendered abstract illustration of blue nerve cell. — Stock Photo
    3d rendered abstract illustration of blue nerve cell.
    Leaf epidermis, light micrograph. Leaf epidermis has small pores, called stomata, which open up for photosynthetic gas exchange and transpiration. — Stock Photo
    Leaf epidermis, light micrograph. Leaf epidermis has small pores, called stomata, which open up for photosynthetic gas exchange and transpiration.
    Tumour tissue cells, digital illustration. — Stock Photo
    Tumour tissue cells, digital illustration.
    Purple colored nerve cell on white background, digital illustration. — Stock Photo
    Purple colored nerve cell on white background, digital illustration.
    Stomach cancer cell, computer illustration — Stock Photo
    Stomach cancer cell, computer illustration
    Fractured pancreas tissue — Stock Photo
    Fractured pancreas tissue
    Green colored nerve cell on white background, digital illustration. — Stock Photo
    Green colored nerve cell on white background, digital illustration.
    Influenza viruses and host cell — Stock Photo
    Influenza viruses and host cell
    Confocal light micrograph of mammalian fibroblast cells. — Stock Photo
    Confocal light micrograph of mammalian fibroblast cells.
    Medical illustration of human cell structure on dark background. — Stock Photo
    Medical illustration of human cell structure on dark background.
    Pink colored nerve cell on white background, digital illustration. — Stock Photo
    Pink colored nerve cell on white background, digital illustration.