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    Duct lined with pseudostratified epithelium — Stock Photo
    Duct lined with pseudostratified epithelium
    Cellular organelles and mitochondrion — Stock Photo
    Cellular organelles and mitochondrion
    Human brain cells — Stock Photo
    Human brain cells
    Human sperm cells — Stock Photo
    Human sperm cells
    Adenocarcinoma of the sigmoid colon — Stock Photo
    Adenocarcinoma of the sigmoid colon
    Section through the olfactory epithelium — Stock Photo
    Section through the olfactory epithelium
    Intestinal villi projections — Stock Photo
    Intestinal villi projections
    Light micrograph of goblet cells in colon. — Stock Photo
    Light micrograph of goblet cells in colon.
    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.
    Animal Cells in culture — Stock Photo
    Animal Cells in culture
    Human sperm cells — Stock Photo
    Human sperm cells
    Epithelium from a fallopian tube — Stock Photo
    Epithelium from a fallopian tube
    Visual rendering of Animal cells — Stock Photo
    Visual rendering of Animal cells
    Visual rendering of Animal cells — Stock Photo
    Visual rendering of Animal cells
    Columnar epithelium structure — Stock Photo
    Columnar epithelium structure
    Epithelium of a foliate papillae of the tongue — Stock Photo
    Epithelium of a foliate papillae of the tongue
    Light micrograph (LM) of the nasal sinuses ( lined by brown epithelium ) and the supporting cartilages (pink). — Stock Photo
    Light micrograph (LM) of the nasal sinuses ( lined by brown epithelium ) and the supporting cartilages (pink).
    Red blood cells — Stock Photo
    Red blood cells
    Layer of cells, light micrograph and computer illustration. — Stock Photo
    Layer of cells, light micrograph and computer illustration.
    Cellular organelles and mitochondrion — Stock Photo
    Cellular organelles and mitochondrion
    Human white blood cell — Stock Photo
    Human white blood cell
    Cross-section through a fallopian tube — Stock Photo
    Cross-section through a fallopian tube
    Freeze-fractured lens of an eye — Stock Photo
    Freeze-fractured lens of an eye
    Finger-like projections of the duodenum — Stock Photo
    Finger-like projections of the duodenum
    Structure of cellular organelles — Stock Photo
    Structure of cellular organelles
    Human sperm cells — Stock Photo
    Human sperm cells
    Medical illustration of human cell structure on white background. — Stock Photo
    Medical illustration of human cell structure on white background.
    Transverse section through a leaf showing foveate stomata (light areas on underside of leaf. — Stock Photo
    Transverse section through a leaf showing foveate stomata (light areas on underside of leaf.
    Transparent cells on grey background, digital illustration. — Stock Photo
    Transparent cells on grey background, digital illustration.
    Light micrograph of a section through the surface of a tonsil showing the stratified squamous epithelium (pink) and underlying lymphoid tissue. — Stock Photo
    Light micrograph of a section through the surface of a tonsil showing the stratified squamous epithelium (pink) and underlying lymphoid tissue.
    Digital illustration of structure of bilayer with phospholipids plasma membrane enclosing cells. — Stock Photo
    Digital illustration of structure of bilayer with phospholipids plasma membrane enclosing cells.
    Magnified digital illustration of mast cell. — Stock Photo
    Magnified digital illustration of mast cell.
    Structure of neutrophil white blood cell, digital illustration. — Stock Photo
    Structure of neutrophil white blood cell, digital illustration.
    Close-up 3d illustration of blue cells pattern with red nuclei. — Stock Photo
    Close-up 3d illustration of blue cells pattern with red nuclei.
    Nerve cells and axon structures — Stock Photo
    Nerve cells and axon structures
    Medical illustration of human cell structure on white background. — Stock Photo
    Medical illustration of human cell structure on white background.
    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.
    3d illustration of a Golgi apparatus, or body, within a eukaryotic cell. Golgi are membrane-bound organelles that modify and package proteins. — Stock Photo
    3d illustration of a Golgi apparatus, or body, within a eukaryotic cell. Golgi are membrane-bound organelles that modify and package proteins.
    Duct lined with pseudostratified epithelium — Stock Photo
    Duct lined with pseudostratified epithelium
    Cell membrane structure, digital illustration. — Stock Photo
    Cell membrane structure, digital illustration.
    Magnified digital illustration of basophil cell. — Stock Photo
    Magnified digital illustration of basophil cell.
    Illustration of blue cell membrane on white background. — Stock Photo
    Illustration of blue cell membrane on white background.
    Human sperm cells — Stock Photo
    Human sperm cells
    Magnified digital illustration of morula cells. — Stock Photo
    Magnified digital illustration of morula cells.
    Monocyte white blood cell in blood smear, digital illustration. — Stock Photo
    Monocyte white blood cell in blood smear, digital illustration.
    Molecular model of pink mdm2 protein binding to anti-cancer protein p53. — Stock Photo
    Molecular model of pink mdm2 protein binding to anti-cancer protein p53.
    Visual rendering of Animal cells — Stock Photo
    Visual rendering of Animal cells
    Genetic engineering, conceptual illustration. — Stock Photo
    Genetic engineering, conceptual illustration.
    Basophil white blood cell and red blood cells, digital illustration. — Stock Photo
    Basophil white blood cell and red blood cells, digital illustration.
    Bile duct cellular sctructure — Stock Photo
    Bile duct cellular sctructure
    LDL receptors on cell membrane, illustration — Stock Photo
    LDL receptors on cell membrane, illustration
    Monocyte and lymphocyte white blood cells in blood smear, digital illustration. — Stock Photo
    Monocyte and lymphocyte white blood cells in blood smear, digital illustration.
    Visual rendering of Animal cells — Stock Photo
    Visual rendering of Animal cells
    Magnified digital illustration of human cell cross-section. — Stock Photo
    Magnified digital illustration of human cell cross-section.
    Magnified digital illustration of megakaryocyte cell. — Stock Photo
    Magnified digital illustration of megakaryocyte cell.
    Layer of cells, computer illustration — Stock Photo
    Layer of cells, computer illustration
    Magnified digital illustration of human cell cross-section. — Stock Photo
    Magnified digital illustration of human cell cross-section.
    Magnified digital illustration of Candida albicans yeast. — Stock Photo
    Magnified digital illustration of Candida albicans yeast.
    Magnified digital illustration of blastocyst cell. — Stock Photo
    Magnified digital illustration of blastocyst cell.
    Finger-like projections of the duodenum — Stock Photo
    Finger-like projections of the duodenum