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    Male anatomy showing vascular system, computer illustration. — Stock Photo
    Male anatomy showing vascular system, computer illustration.
    Close-up illustration of trachea in male body silhouette. — Stock Photo
    Close-up illustration of trachea in male body silhouette.
    Vascular system in male body, computer illustration. — Stock Photo
    Vascular system in male body, computer illustration.
    Male anatomy showing vascular system, computer illustration. — Stock Photo
    Male anatomy showing vascular system, computer illustration.
    Grey human heart model on red background, computer illustration. — Stock Photo
    Grey human heart model on red background, computer illustration.
    Illustration of bronchi in male body silhouette on white background. — Stock Photo
    Illustration of bronchi in male body silhouette on white background.
    Mid section illustration of lungs in male body silhouette. — Stock Photo
    Mid section illustration of lungs in male body silhouette.
    Visible heart in female body silhouette, computer illustration. — Stock Photo
    Visible heart in female body silhouette, computer illustration.
    Illustration of transparent gray silhouette of male body with colored lungs. — Stock Photo
    Illustration of transparent gray silhouette of male body with colored lungs.
    Male anatomy showing vascular system, computer illustration. — Stock Photo
    Male anatomy showing vascular system, computer illustration.
    Coronary blood vessels in blue human heart model, digital illustration. — Stock Photo
    Coronary blood vessels in blue human heart model, digital illustration.
    Vascular system in normal female body, digital illustration — Stock Photo
    Vascular system in normal female body, digital illustration
    Digital illustration of rod-shaped bacteria inside alveoli of lungs causing pneumonia. — Stock Photo
    Digital illustration of rod-shaped bacteria inside alveoli of lungs causing pneumonia.
    Illustration of visible colored lungs in transparent human body silhouette. — Stock Photo
    Illustration of visible colored lungs in transparent human body silhouette.
    Human heart with colored left ventricle, computer illustration. — Stock Photo
    Human heart with colored left ventricle, computer illustration.
    Female anatomy showing heart in transparent body silhouette, computer illustration. — Stock Photo
    Female anatomy showing heart in transparent body silhouette, computer illustration.
    Female body with visible vascular system, digital illustration. — Stock Photo
    Female body with visible vascular system, digital illustration.
    Female anatomy showing vascular system, digital illustration. — Stock Photo
    Female anatomy showing vascular system, digital illustration.
    Realistic human heart and blood vessels on black background, digital illustration. — Stock Photo
    Realistic human heart and blood vessels on black background, digital illustration.
    Visible heart in female body silhouette, computer illustration. — Stock Photo
    Visible heart in female body silhouette, computer illustration.
    Vascular system of female human head, computer illustration. — Stock Photo
    Vascular system of female human head, computer illustration.
    Illustration of Streptococcus pneumoniae bacteria inside alveoli of lungs causing pneumonia. — Stock Photo
    Illustration of Streptococcus pneumoniae bacteria inside alveoli of lungs causing pneumonia.
    Male body silhouette showing heart anatomy, computer illustration. — Stock Photo
    Male body silhouette showing heart anatomy, computer 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.
    Orange colored lungs in female body silhouette, computer illustration. — Stock Photo
    Orange colored lungs in female body silhouette, computer illustration.
    Abstract male figure showing colored bronchi, computer illustration. — Stock Photo
    Abstract male figure showing colored bronchi, computer illustration.
    Human bronchi and heart, illustration — Stock Photo
    Human bronchi and heart, illustration
    Realistic human heart and blood vessels on white background, digital illustration. — Stock Photo
    Realistic human heart and blood vessels on white background, digital illustration.
    Realistic human heart model on black background, computer illustration. — Stock Photo
    Realistic human heart model on black background, computer illustration.
    Female body with visible cardiovascular system, digital illustration. — Stock Photo
    Female body with visible cardiovascular system, digital illustration.
    Orange colored lungs in male body silhouette, computer illustration. — Stock Photo
    Orange colored lungs in male body silhouette, computer illustration.
    Transparent male silhouette with colored bronchi, computer illustration. — Stock Photo
    Transparent male silhouette with colored bronchi, computer illustration.
    Vascular system in normal female body, digital illustration — Stock Photo
    Vascular system in normal female body, digital illustration
    Female anatomy showing heart in transparent body silhouette, computer illustration. — Stock Photo
    Female anatomy showing heart in transparent body silhouette, computer illustration.
    Illustration of senior woman blue silhouette with highlighted lungs on white background. — Stock Photo
    Illustration of senior woman blue silhouette with highlighted lungs on white background.
    Male body silhouette showing heart anatomy, computer illustration. — Stock Photo
    Male body silhouette showing heart anatomy, computer illustration.
    Human heart with disease, computer illustration. — Stock Photo
    Human heart with disease, computer illustration.
    Conceptual illustration of coronavirus particles in human lungs. — Stock Photo
    Conceptual illustration of coronavirus particles in human lungs.
    Digital illustration and light micrograph of squamous cell carcinoma of lung. — Stock Photo
    Digital illustration and light micrograph of squamous cell carcinoma of lung.
    Female anatomy showing heart in transparent body silhouette, computer illustration. — Stock Photo
    Female anatomy showing heart in transparent body silhouette, computer illustration.
    Light micrograph (LM) of a vertical section through the pseudostratified columnar epithelium from the trachea, the tube in the throat leading from the mouth to the bronchus and the lungs. — Stock Photo
    Light micrograph (LM) of a vertical section through the pseudostratified columnar epithelium from the trachea, the tube in the throat leading from the mouth to the bronchus and the lungs.
    Silhouette of human lungs on white background, digital illustration. — Stock Photo
    Silhouette of human lungs on white background, digital illustration.
    Coloured computed tomography (CT) scan of a section through the chest of a 76-year-old male patient with a malignant (cancerous) tumour (bright, right) of the bronchus. — Stock Photo
    Coloured computed tomography (CT) scan of a section through the chest of a 76-year-old male patient with a malignant (cancerous) tumour (bright, right) of the bronchus.
    Lobar pneumonia in stage of congestion and consolidation, digital illustration and light micrograph. — Stock Photo
    Lobar pneumonia in stage of congestion and consolidation, digital illustration and light micrograph.
    Conceptual illustration of coronavirus particles in human lungs. — Stock Photo
    Conceptual illustration of coronavirus particles in human lungs.
    3d rendered illustration of human vascular system. — Stock Photo
    3d rendered illustration of human vascular system.
    Vascular system of female upper body, computer illustration. — Stock Photo
    Vascular system of female upper body, computer illustration.
    Female heart and vascular system, digital illustration. — Stock Photo
    Female heart and vascular system, digital illustration.
    Female vascular system, computer illustration. — Stock Photo
    Female vascular system, computer illustration.
    Cardiovascular system in normal male body, computer illustration. — Stock Photo
    Cardiovascular system in normal male body, computer illustration.
    Female heart and vascular system, digital illustration. — Stock Photo
    Female heart and vascular system, digital illustration.
    Lobar pneumonia in stage of red hepatisation, conceptual digital illustration. — Stock Photo
    Lobar pneumonia in stage of red hepatisation, conceptual digital illustration.
    Chest, neck and head arteries — Stock Photo
    Chest, neck and head arteries
    Female body with visible heart, computer illustration. — Stock Photo
    Female body with visible heart, computer illustration.
    Illustration of transparent blue silhouette of male body with colored heart. — Stock Photo
    Illustration of transparent blue silhouette of male body with colored heart.
    Vascular system in normal female body, digital illustration — Stock Photo
    Vascular system in normal female body, digital illustration
    Orange colored lungs in male body silhouette, computer illustration. — Stock Photo
    Orange colored lungs in male body silhouette, computer illustration.
    Lobar pneumonia in stage of grey hepatisation or late consolidation, digital illustration and light micrograph. — Stock Photo
    Lobar pneumonia in stage of grey hepatisation or late consolidation, digital illustration and light micrograph.
    Male head and neck anatomy and blood vessels, computer illustration. — Stock Photo
    Male head and neck anatomy and blood vessels, computer illustration.
    Illustration of transparent blue silhouette of male body with colored heart. — Stock Photo
    Illustration of transparent blue silhouette of male body with colored heart.