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    Digital illustration of human cilia cells. — Stock Photo
    Digital illustration of human cilia cells.
    Coloured scanning electron micrograph of Staphylococcus aureus bacteria. — Stock Photo
    Coloured scanning electron micrograph of Staphylococcus aureus bacteria.
    Duct lined with pseudostratified epithelium — Stock Photo
    Duct lined with pseudostratified epithelium
    Human intestinal villus, digital illustration. — Stock Photo
    Human intestinal villus, digital illustration.
    Medical illustration of inflamed intestinal villi. — Stock Photo
    Medical illustration of inflamed intestinal villi.
    Composite image of nasal epithelium and pollen. Coloured Scanning Electron Micrograph (SEM) of the surface of nasal epithelium with inhaled in pollen. — Stock Photo
    Composite image of nasal epithelium and pollen. Coloured Scanning Electron Micrograph (SEM) of the surface of nasal epithelium with inhaled in pollen.
    Streptococcus thermophilus bacteria — Stock Photo
    Streptococcus thermophilus bacteria
    Gum tissue with gingivitis — Stock Photo
    Gum tissue with gingivitis
    Finger-like projections of the duodenum — Stock Photo
    Finger-like projections of the duodenum
    Hair follicles of human skin — Stock Photo
    Hair follicles of human skin
    Structure of trachea, light micrograph. — Stock Photo
    Structure of trachea, light micrograph.
    Medical illustration of bacteria in human intestine. — Stock Photo
    Medical illustration of bacteria in human intestine.
    Tonsilitis, light micrograph. Tonsilitis is the inflammation of the tonsils. Haematoxylin and eosin stain. — Stock Photo
    Tonsilitis, light micrograph. Tonsilitis is the inflammation of the tonsils. Haematoxylin and eosin stain.
    Medical artwork of healthy intestinal villi in digestive system. — Stock Photo
    Medical artwork of healthy intestinal villi in digestive system.
    Medical illustration of healthy intestinal villi in gastrointestinal tract. — Stock Photo
    Medical illustration of healthy intestinal villi in gastrointestinal tract.
    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.
    Composite image of nasal epithelium and pollen. Coloured Scanning Electron Micrograph (SEM) of the surface of nasal epithelium with inhaled in pollen. — Stock Photo
    Composite image of nasal epithelium and pollen. Coloured Scanning Electron Micrograph (SEM) of the surface of nasal epithelium with inhaled in pollen.
    Simple columnar epithelium, digital illustration. — Stock Photo
    Simple columnar epithelium, digital illustration.
    Medical illustration of bacteria in human intestine. — Stock Photo
    Medical illustration of bacteria in human intestine.
    Human intestinal villi, computer illustration. — Stock Photo
    Human intestinal villi, computer illustration.
    Hair shafts growing from human skin — Stock Photo
    Hair shafts growing from human skin
    Composite image of nasal epithelium and pollen. Coloured Scanning Electron Micrograph (SEM) of the surface of nasal epithelium with inhaled in pollen. — Stock Photo
    Composite image of nasal epithelium and pollen. Coloured Scanning Electron Micrograph (SEM) of the surface of nasal epithelium with inhaled in pollen.
    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).
    Medical illustration of intestinal villi in human intestine. — Stock Photo
    Medical illustration of intestinal villi in human intestine.
    Trachea lined with ciliated columnar epithelium — Stock Photo
    Trachea lined with ciliated columnar epithelium
    Stomach lining. Coloured scanning electron micrograph (SEM) of the glandular lining (mucosa) of the stomach. The gastric mucosa secretes the digestive enzymes and hydrochloric acid — Stock Photo
    Stomach lining. Coloured scanning electron micrograph (SEM) of the glandular lining (mucosa) of the stomach. The gastric mucosa secretes the digestive enzymes and hydrochloric acid
    Trachea (wind pipe) lining, coloured scanning electron micrograph (SEM). — Stock Photo
    Trachea (wind pipe) lining, coloured scanning electron micrograph (SEM).
    Medical illustration of inflamed intestinal villi. — Stock Photo
    Medical illustration of inflamed intestinal villi.
    Stratified cuboidal epithelium, digital illustration. — Stock Photo
    Stratified cuboidal epithelium, digital illustration.
    Digital illustration of human cilia cells. — Stock Photo
    Digital illustration of human cilia cells.
    Medical illustration of the female breast anatomy — Stock Photo
    Medical illustration of the female breast anatomy
    Medical illustration of inflamed intestinal villi. — Stock Photo
    Medical illustration of inflamed intestinal villi.
    Composite image of nasal epithelium and pollen. Coloured Scanning Electron Micrograph (SEM) of the surface of nasal epithelium with inhaled in pollen. — Stock Photo
    Composite image of nasal epithelium and pollen. Coloured Scanning Electron Micrograph (SEM) of the surface of nasal epithelium with inhaled in pollen.
    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.
    Whooping cough bacterium (Bordetella pertussis), illustration. These rod-shaped Gram-negative bacilli cause whooping cough, known as pertussis, mainly in infants — Stock Photo
    Whooping cough bacterium (Bordetella pertussis), illustration. These rod-shaped Gram-negative bacilli cause whooping cough, known as pertussis, mainly in infants
    Colon cancer, digital illustration and light micrograph showing colon adenocarcinoma. — Stock Photo
    Colon cancer, digital illustration and light micrograph showing colon adenocarcinoma.
    Colored scanning electron micrograph of surface of human fallopian tube with epithelium of columnar cells with cilia. — Stock Photo
    Colored scanning electron micrograph of surface of human fallopian tube with epithelium of columnar cells with cilia.
    Human oesophagus wall — Stock Photo
    Human oesophagus wall
    Colon cancer, digital illustration and light micrograph showing colon adenocarcinoma. — Stock Photo
    Colon cancer, digital illustration and light micrograph showing colon adenocarcinoma.
    Medical artwork of healthy intestinal villi in digestive system. — Stock Photo
    Medical artwork of healthy intestinal villi in digestive system.
    Simple columnar epithelium, light micrograph — Stock Photo
    Simple columnar epithelium, light micrograph
    Intestinal microvilli. Coloured transmission electron micrograph (TEM) of a section through microvilli from the small intestine. These tiny structures (cyan) form a dense brush-like covering on the absorptive surfaces of the cells — Stock Photo
    Intestinal microvilli. Coloured transmission electron micrograph (TEM) of a section through microvilli from the small intestine. These tiny structures (cyan) form a dense brush-like covering on the absorptive surfaces of the cells
    Human intestinal villi, computer illustration. — Stock Photo
    Human intestinal villi, computer illustration.
    Freeze-fractured lens of an eye — Stock Photo
    Freeze-fractured lens of an eye
    Human intestinal villi, computer illustration. — Stock Photo
    Human intestinal villi, computer illustration.
    Intestinal villi, computer illustration — Stock Photo
    Intestinal villi, computer illustration
    Medical artwork showing intestinal villi in bowel. — Stock Photo
    Medical artwork showing intestinal villi in bowel.
    Epithelium of a foliate papillae of the tongue — Stock Photo
    Epithelium of a foliate papillae of the tongue
    Crypts of Lieberkuhn. Light micrograph (LM). Crypts of Lieberkuhn of the colon shown in cross section. Crypts are long blind-ending tube-like extensions of the surface epithelial lining of the gut — Stock Photo
    Crypts of Lieberkuhn. Light micrograph (LM). Crypts of Lieberkuhn of the colon shown in cross section. Crypts are long blind-ending tube-like extensions of the surface epithelial lining of the gut
    Coloured scanning electron micrograph (SEM) of a fractured bile duct. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a fractured bile duct.
    Bone from the vertebral column — Stock Photo
    Bone from the vertebral column
    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).
    Duct is lined with pseudostratified epithelium — Stock Photo
    Duct is lined with pseudostratified epithelium
    Medical artwork showing intestinal villi in bowel. — Stock Photo
    Medical artwork showing intestinal villi in bowel.
    Sperm in a fallopian tube. Coloured composition scanning electron micrograph (SEM) of human sperm travelling through a fallopian tube (oviduct) of a female — Stock Photo
    Sperm in a fallopian tube. Coloured composition scanning electron micrograph (SEM) of human sperm travelling through a fallopian tube (oviduct) of a female
    Simple columnar epithelium, digital illustration. — Stock Photo
    Simple columnar epithelium, digital illustration.
    Medical artwork of healthy intestinal villi in digestive system. — Stock Photo
    Medical artwork of healthy intestinal villi in digestive system.
    Coloured scanning electron micrograph (SEM) of epithelial cells lining the human trachea (windpipe). — Stock Photo
    Coloured scanning electron micrograph (SEM) of epithelial cells lining the human trachea (windpipe).
    Illustration of gluten particles damaging intestinal villi. — Stock Photo
    Illustration of gluten particles damaging intestinal villi.
    Finger-like projections of the duodenum — Stock Photo
    Finger-like projections of the duodenum