Images Dated 10th October 2003

Downtown Skyline, Houston, TX

© Viola'S Photo Visions Inc. / Animals Animals/Earth Scenes

Aa Photographer, America, Architecture, Building, Cities, City, Cityscape, Down Town, Franklin Viola, Group, High Way, Houston, Landscape, Light, Location, Night, North America, Number, Out Side, Outdoor, Outdoors, Road, Scen Ic, Sky Line, Sky Scraper, Texas, Thp, Time

Maple leaves are illuminated by the sun outside the Peter and Paul fortress in St

Maple leaves are illuminated by the sun outside the Peter and Paul fortress in St. Petersburg, Russia's second city, October 10, 2003. NO RIGHTS CLEARANCES OR PERMISSIONS ARE REQUIRED FOR THIS IMAGE REUTERS/Alexander Demianchuk - RP5DRHYILDAA

Artwork of sputum in lungs with chronic bronchitis

Chronic bronchitis. Illustration of sputum collecting in the airways of a human lung affected by chronic bronchitis. The lobed structures are bunches of alveoli, the tiny air sacs where oxygen is absorbed into the blood. Chronic bronchitis is a common condition in which sputum, a yellow-green fluid, is coughed up regularly over a number of years. The sputum is produced by mucus-secreting cells in lung's airways when inflamed by infection or irritation. The disease also causes narrowing of airways in the lungs, and is associated with smoking. There is no cure for chronic bronchitis, which often shows an inexorable progression with increasing shortness of breath

© JOHN BAVOSI/SCIENCE PHOTO LIBRARY