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    Microvilli from the small intestine — Stock Photo
    Microvilli from the small intestine
    Trachea (wind pipe) lining, coloured scanning electron micrograph (SEM). — Stock Photo
    Trachea (wind pipe) lining, coloured scanning electron micrograph (SEM).
    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).
    Microvilli from the small intestine — Stock Photo
    Microvilli from the small intestine
    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).
    Colon lining and mucous producing cells — Stock Photo
    Colon lining and mucous producing cells
    Coloured scanning electron micrograph (SEM) of a section through a foetal vein filled with red blood cells (erythrocytes, red). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a section through a foetal vein filled with red blood cells (erythrocytes, red).
    Woman with camera phone photographing friends in zip line equipment — Stock Photo
    Woman with camera phone photographing friends in zip line equipment
    Intestinal villi projections — Stock Photo
    Intestinal villi projections
    Playful friends in zip line equipment posing — Stock Photo
    Playful friends in zip line equipment posing
    Colon lining and mucous producing cells — Stock Photo
    Colon lining and mucous producing cells
    Happy woman zip lining above trees — Stock Photo
    Happy woman zip lining above trees
    Lining of the small intestine — Stock Photo
    Lining of the small intestine
    Section through the olfactory epithelium — Stock Photo
    Section through the olfactory epithelium
    Trachea (wind pipe) lining, coloured scanning electron micrograph (SEM). — Stock Photo
    Trachea (wind pipe) lining, coloured scanning electron micrograph (SEM).
    Gall bladder lining — Stock Photo
    Gall bladder lining
    Finger-like projections of the duodenum — Stock Photo
    Finger-like projections of the duodenum
    Intestinal villi projections — Stock Photo
    Intestinal villi projections
    Coloured scanning electron micrograph (SEM) of the surface of a squamous epithelial cell from the ureter. — Stock Photo
    Coloured scanning electron micrograph (SEM) of the surface of a squamous epithelial cell from the ureter.
    Intestinal villi projections — Stock Photo
    Intestinal villi projections
    Woman with smart phone photographing man preparing zip line equipment — Stock Photo
    Woman with smart phone photographing man preparing zip line equipment
    Cilia covering the epithelial lining of the nasopharyx — Stock Photo
    Cilia covering the epithelial lining of the nasopharyx
    Paranasal sinus epithelium — Stock Photo
    Paranasal sinus epithelium
    Epithelial lining of Fallopian tube — Stock Photo
    Epithelial lining of Fallopian tube
    Osteoclast, computer illustration, colorful image — Stock Photo
    Osteoclast, computer illustration, colorful image
    Section through the olfactory epithelium — Stock Photo
    Section through the olfactory epithelium
    Intestinal villi projections — Stock Photo
    Intestinal villi projections
    Trachea lined with ciliated columnar epithelium — Stock Photo
    Trachea lined with ciliated columnar epithelium
    Light micrograph (bottom left) and computer illustration (top right) of the lining of the stomach, known as the mucosa. — Stock Photo
    Light micrograph (bottom left) and computer illustration (top right) of the lining of the stomach, known as the mucosa.
    Intestinal villi projections — Stock Photo
    Intestinal villi projections
    Cilia covering the epithelial lining of the nasopharyx — Stock Photo
    Cilia covering the epithelial lining of the nasopharyx
    Light micrograph (bottom left) and computer illustration (top right) of the lining of the stomach, known as the mucosa. — Stock Photo
    Light micrograph (bottom left) and computer illustration (top right) of the lining of the stomach, known as the mucosa.