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    Human silhouette showing lung cancer tumor, conceptual illustration. — Stock Photo
    Human silhouette showing lung cancer tumor, conceptual illustration.
    Illustration of senior man silhouette with visible larynx. — Stock Photo
    Illustration of senior man silhouette with visible larynx.
    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.
    Diseased lungs in transparent male body on white background, computer illustration. — Stock Photo
    Diseased lungs in transparent male body on white background, computer illustration.
    Illustration of blue silhouette of obese woman with highlighted lungs. — Stock Photo
    Illustration of blue silhouette of obese woman with highlighted lungs.
    Illustration of senior man silhouette with visible lungs. — Stock Photo
    Illustration of senior man silhouette with visible lungs.
    Digital illustration of senior man anatomy showing lungs. — Stock Photo
    Digital illustration of senior man anatomy showing lungs.
    Illustration of senior woman blue silhouette with highlighted larynx on black background. — Stock Photo
    Illustration of senior woman blue silhouette with highlighted larynx on black background.
    Human larynx, computer illustration — Stock Photo
    Human larynx, computer illustration
    Illustration of human thorax anatomy in body silhouette. — Stock Photo
    Illustration of human thorax anatomy in body silhouette.
    Transparent male silhouette with colored lungs, computer illustration. — Stock Photo
    Transparent male silhouette with colored lungs, computer illustration.
    Mucosa of the trachea — Stock Photo
    Mucosa of the trachea
    Illustration of larynx in male body silhouette on black background. — Stock Photo
    Illustration of larynx in male body silhouette on black background.
    Bacterial sinusitis, computer illustration. The sinuses are membrane-lined air-filled spaces in the bones of the face. The frontal sinuses are above the eyes. Below these are the many lobed ethmoid sinuses and behind them the sphenoid sinuses — Stock Photo
    Bacterial sinusitis, computer illustration. The sinuses are membrane-lined air-filled spaces in the bones of the face. The frontal sinuses are above the eyes. Below these are the many lobed ethmoid sinuses and behind them the sphenoid sinuses
    Digital illustration of human alveoli on white background. — Stock Photo
    Digital illustration of human alveoli on white background.
    Illustration of bronchi cancer in male body silhouette on black background. — Stock Photo
    Illustration of bronchi cancer in male body silhouette on black background.
    Red colored lungs in female body silhouette on blue background, digital illustration. — Stock Photo
    Red colored lungs in female body silhouette on blue background, digital illustration.
    Transparent male silhouette with visible bronchi, computer illustration. — Stock Photo
    Transparent male silhouette with visible bronchi, computer illustration.
    Hyaline cartilage, a semi-rigid connective tissue — Stock Photo
    Hyaline cartilage, a semi-rigid connective tissue
    Illustration of transparent blue silhouette of male body with colored bronchi. — Stock Photo
    Illustration of transparent blue silhouette of male body with colored bronchi.
    Digital illustration of human alveoli on white background. — Stock Photo
    Digital illustration of human alveoli on white background.
    3d rendered illustration of colored female lungs in body silhouette. — Stock Photo
    3d rendered illustration of colored female lungs in body silhouette.
    Human Bronchi, computer illustration — Stock Photo
    Human Bronchi, computer illustration
    Mid section illustration of bronchi in male body silhouette. — Stock Photo
    Mid section illustration of bronchi in male body silhouette.
    Horse anatomy and skeletal system, computer illustration. — Stock Photo
    Horse anatomy and skeletal system, computer illustration.
    3d rendered illustration of blue silhouette of man with inflamed lungs on white background. — Stock Photo
    3d rendered illustration of blue silhouette of man with inflamed lungs on white background.
    Transparent male silhouette with colored larynx, computer illustration. — Stock Photo
    Transparent male silhouette with colored larynx, computer illustration.
    Illustration of bronchi in male body silhouette on white background. — Stock Photo
    Illustration of bronchi in male body silhouette on white background.
    Colored lungs in transparent female body on black background, computer illustration. — Stock Photo
    Colored lungs in transparent female body on black background, computer illustration.
    Illustration of figure of obese man with visible larynx. — Stock Photo
    Illustration of figure of obese man with visible larynx.
    Horse anatomy of upper body, computer illustration. — Stock Photo
    Horse anatomy of upper body, computer illustration.
    Trachea lined with ciliated columnar epithelium — Stock Photo
    Trachea lined with ciliated columnar epithelium
    Illustration of female silhouette with highlighted larynx. — Stock Photo
    Illustration of female silhouette with highlighted larynx.
    Illustration of female silhouette with highlighted lungs. — Stock Photo
    Illustration of female silhouette with highlighted lungs.
    Close-up illustration of trachea in male body silhouette. — Stock Photo
    Close-up illustration of trachea in male body silhouette.
    Illustration of bronchi in male body silhouette on black background. — Stock Photo
    Illustration of bronchi in male body silhouette on black background.
    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
    Diseased lungs in transparent male body on white background, computer illustration. — Stock Photo
    Diseased lungs in transparent male body on white background, computer illustration.
    Hyaline cartilage, a semi-rigid connective tissue — Stock Photo
    Hyaline cartilage, a semi-rigid connective tissue
    Orange colored lungs in female body silhouette, computer illustration. — Stock Photo
    Orange colored lungs in female body silhouette, computer illustration.
    Illustration of human heart and lungs on white background. — Stock Photo
    Illustration of human heart and lungs on white background.
    Illustration of lung cancer in male body silhouette on black background. — Stock Photo
    Illustration of lung cancer in male body silhouette on black background.
    Flu virus in trachea, digital illustration. — Stock Photo
    Flu virus in trachea, digital illustration.
    Illustration of larynx in silhouette of female body. — Stock Photo
    Illustration of larynx in silhouette of female body.
    Horse anatomy with visible internal organs on white background, computer illustration. — Stock Photo
    Horse anatomy with visible internal organs on white background, computer illustration.
    Medical illustration of human respiratory and digestive systems — Stock Photo
    Medical illustration of human respiratory and digestive systems
    Illustration of silhouette of obese man with visible lungs. — Stock Photo
    Illustration of silhouette of obese man with visible lungs.
    Abstract male body with sore throat on blue background, conceptual digital illustration. — Stock Photo
    Abstract male body with sore throat on blue background, conceptual digital illustration.
    Illustration of lung tumour in transparent male silhouette. — Stock Photo
    Illustration of lung tumour in transparent male silhouette.
    Yellow colored bronchi in body of woman, computer illustration. — Stock Photo
    Yellow colored bronchi in body of woman, computer illustration.
    Illustration of transparent blue silhouette of male body with colored lungs. — Stock Photo
    Illustration of transparent blue silhouette of male body with colored lungs.
    Illustration of figure of obese man with visible lungs. — Stock Photo
    Illustration of figure of obese man with visible lungs.
    Illustration of senior man silhouette with visible throat anatomy. — Stock Photo
    Illustration of senior man silhouette with visible throat anatomy.
    Lungs in anatomy of male body, computer illustration. — Stock Photo
    Lungs in anatomy of male body, computer 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
    Colored lungs in transparent female body on black background, computer illustration. — Stock Photo
    Colored lungs in transparent female body on black background, computer illustration.
    Frontal illustration of blue silhouette of obese woman with highlighted larynx on black background. — Stock Photo
    Frontal illustration of blue silhouette of obese woman with highlighted larynx on black background.
    Orange colored lungs in female body silhouette, computer illustration. — Stock Photo
    Orange colored lungs in female body silhouette, computer illustration.
    Illustration of female silhouette with highlighted lungs. — Stock Photo
    Illustration of female silhouette with highlighted lungs.
    Illustration of larynx cancer in male body silhouette on black background. — Stock Photo
    Illustration of larynx cancer in male body silhouette on black background.