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    Normal human alveoli anatomy — Stock Photo
    Normal human alveoli anatomy
    Scientist holding multi-well plate with growth medium. — Stock Photo
    Scientist holding multi-well plate with growth medium.
    Human silhouette showing heart with blood vessels and bronchial tree on white background. — Stock Photo
    Human silhouette showing heart with blood vessels and bronchial tree on white background.
    Light micrograph of a section through the liver of a patient with glycogenosis, or glycogen storage disease (GSD). GSD is a rare condition that changes the way the body uses and stores glycogen, a form of sugar or glucose. Haematoxylin and eosin stai — Stock Photo
    Light micrograph of a section through the liver of a patient with glycogenosis, or glycogen storage disease (GSD). GSD is a rare condition that changes the way the body uses and stores glycogen, a form of sugar or glucose. Haematoxylin and eosin stai
    Blue colored nerve cell on dark background, digital illustration. — Stock Photo
    Blue colored nerve cell on dark background, digital illustration.
    Asian mature woman blowing nose. — Stock Photo
    Asian mature woman blowing nose.
    Human hair, coloured scanning electron micrograph (SEM). Magnification: x550 when printed at 10 centimetres wide. — Stock Photo
    Human hair, coloured scanning electron micrograph (SEM). Magnification: x550 when printed at 10 centimetres wide.
    Little boy blowing nose in hospital on check up — Stock Photo
    Little boy blowing nose in hospital on check up
    Coloured scanning electron micrograph (SEM) of a freeze-fractured Nasturtium stem, showing numerous vascular bundles (such as at upper centre) with an inner xylem (pink) and outer phloem (yellow). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a freeze-fractured Nasturtium stem, showing numerous vascular bundles (such as at upper centre) with an inner xylem (pink) and outer phloem (yellow).
    Human heart with blood vessels and bronchial tree on white background. — Stock Photo
    Human heart with blood vessels and bronchial tree on white background.
    Woman holding cocktail with kumquats — Stock Photo
    Woman holding cocktail with kumquats
    Section through the olfactory epithelium — Stock Photo
    Section through the olfactory epithelium
    Medical illustration of female breast anatomy — Stock Photo
    Medical illustration of female breast anatomy
    Colon cancer, digital illustration and light micrograph showing colon adenocarcinoma. — Stock Photo
    Colon cancer, digital illustration and light micrograph showing colon adenocarcinoma.
    Blood clot, computer illustration — Stock Photo
    Blood clot, computer illustration
    Mature man sneezing into handkerchief. — Stock Photo
    Mature man sneezing into handkerchief.
    Gall bladder. Coloured scanning electron micrograph (SEM) of the surface of a gall bladder. This mucosa lining is made up of cuboidal epithelial cells (yellow) — Stock Photo
    Gall bladder. Coloured scanning electron micrograph (SEM) of the surface of a gall bladder. This mucosa lining is made up of cuboidal epithelial cells (yellow)
    Helicobacter pyloris bacteria — Stock Photo
    Helicobacter pyloris bacteria
    Chinese senior man consoling woman in hospital — Stock Photo
    Chinese senior man consoling woman in hospital
    Main muscles controlling human posture — Stock Photo
    Main muscles controlling human posture
    Fat cells, computer illustration — Stock Photo
    Fat cells, computer illustration
    Public toilet interior with sanitaryware and furniture — Stock Photo
    Public toilet interior with sanitaryware and furniture
    Simple squamous epithelium, digital illustration. — Stock Photo
    Simple squamous epithelium, digital illustration.
    Computer illustration of white adipose (fat) cells, lying in a matrix of collagen. Adipose tissue stores energy and helps insulate our bodies as well as cushioning the organs. — Stock Photo
    Computer illustration of white adipose (fat) cells, lying in a matrix of collagen. Adipose tissue stores energy and helps insulate our bodies as well as cushioning the organs.
    Trachea lining. Coloured transmission electron micrograph (TEM) of a longitudinal section through the lining of the trachea (windpipe), which links the larynx (voicebox) to the lungs — Stock Photo
    Trachea lining. Coloured transmission electron micrograph (TEM) of a longitudinal section through the lining of the trachea (windpipe), which links the larynx (voicebox) to the lungs
    Medical illustration of alveoli on black background — Stock Photo
    Medical illustration of alveoli on black background
    Woman blowing nose on tissue. — Stock Photo
    Woman blowing nose on tissue.
    Abstract close-up of pink fabric structure, digital illustration. — Stock Photo
    Abstract close-up of pink fabric structure, digital illustration.
    American-style vegetable pizza — Stock Photo
    American-style vegetable pizza
    Human skin anatomy and blood supply — Stock Photo
    Human skin anatomy and blood supply
    Cancer cells on tissue surface — Stock Photo
    Cancer cells on tissue surface
    Closeup view of Brandy snap Tuilles with lemon cream in a bowl — Stock Photo
    Closeup view of Brandy snap Tuilles with lemon cream in a bowl
    Male muscle anatomy of the human legs — Stock Photo
    Male muscle anatomy of the human legs
    Human face with bones — Stock Photo
    Human face with bones
    Helianthus stem. Light micrograph (LM) of stem of perennial sunflower (Helianthus sp.) in cross-section showing vascular bundles (green, yellow). Vascular tissues transport water and dissolved substances inside plant — Stock Photo
    Helianthus stem. Light micrograph (LM) of stem of perennial sunflower (Helianthus sp.) in cross-section showing vascular bundles (green, yellow). Vascular tissues transport water and dissolved substances inside plant
    Intestinal villi projections — Stock Photo
    Intestinal villi projections
    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
    Testicular cancer or teratoma — Stock Photo
    Testicular cancer or teratoma
    Gemellus muscles in human hip bones, computer illustration. — Stock Photo
    Gemellus muscles in human hip bones, computer illustration.
    Fat cells and supportive connective tissue — Stock Photo
    Fat cells and supportive connective tissue
    Intestinal villi projections — Stock Photo
    Intestinal villi projections
    Human compact bone tissue, light micrograph. — Stock Photo
    Human compact bone tissue, light micrograph.
    Closeup view of one red crab on tissue — Stock Photo
    Closeup view of one red crab on tissue
    Salmonella sp. bacteria on tissue surface — Stock Photo
    Salmonella sp. bacteria on tissue surface
    Medical illustration of alveoli on black background — Stock Photo
    Medical illustration of alveoli on black background
    Cancer invasion into surrounding tissues, conceptual computer illustration. — Stock Photo
    Cancer invasion into surrounding tissues, conceptual computer illustration.
    Coloured scanning electron micrograph (SEM) of a freeze-fractured Nasturtium stem, showing numerous vascular bundles (such as at upper centre) with an inner xylem (pink) and outer phloem (yellow). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a freeze-fractured Nasturtium stem, showing numerous vascular bundles (such as at upper centre) with an inner xylem (pink) and outer phloem (yellow).
    Methicillin-resistant Staphylococcus aureus — Stock Photo
    Methicillin-resistant Staphylococcus aureus
    Friends sharing a light moment while pouring drinks at a party. — Stock Photo
    Friends sharing a light moment while pouring drinks at a party.
    Abstract biopolymer structure, conceptual illustration. — Stock Photo
    Abstract biopolymer structure, conceptual illustration.
    Genome sequencing machine — Stock Photo
    Genome sequencing machine
    Woody stem section. Coloured scanning electron micrograph (SEM) of a transverse section through the stem of a woody plant. The majority of tissue seen here is secondary xylem (dark brown) — Stock Photo
    Woody stem section. Coloured scanning electron micrograph (SEM) of a transverse section through the stem of a woody plant. The majority of tissue seen here is secondary xylem (dark brown)
    Hamburger with cheese and tomatoes — Stock Photo
    Hamburger with cheese and tomatoes
    Sciatic nerve showing a bundle of nerve fibres — Stock Photo
    Sciatic nerve showing a bundle of nerve fibres
    Close-up of woman blowing nose with handkerchief — Stock Photo
    Close-up of woman blowing nose with handkerchief
    Medical illustration of female breast anatomy — Stock Photo
    Medical illustration of female breast anatomy
    Female anatomy showing internal organs with skeleton on white background. — Stock Photo
    Female anatomy showing internal organs with skeleton on white background.
    Orange colored nerve cell on white background, digital illustration. — Stock Photo
    Orange colored nerve cell on white background, digital illustration.
    Anatomy of human abdominal muscles — Stock Photo
    Anatomy of human abdominal muscles
    Bone tissue production — Stock Photo
    Bone tissue production