Barrett's esophagus refers to an abnormal change in the cells of the lower portion of the esophagus. It is characterized by the replacement of the normal stratified squamous epithelium lining of the esophagus by simple columnar epithelium with goblet cells (which are usually found lower in the gastrointestinal tract).
U.S. Space Camp is a camp and related programs owned and operated by the Alabama Space Science Exhibit Commission's U.S. Space & Rocket Center in Huntsville, Alabama.
Zoom out to find Houston George Bush Intercontinental Airport (IATA code: IAH) in north, distance from city center: 20 miles (32 km). Zoom out to find Lyndon B. Johnson Space Center (blue marker) located in the Bay Area of southeast Houston. Space Center Houston is the National Aeronautics and Space Administration's center for American human spaceflight activities. To find a location use the form below. To view just the map, click on the Map button. Space station flight control room in the Mission Control Center at NASA's Johnson Space Center-Photo: NASA Archive. Bookmark/share this page. To find a location type: street or place, city, optional: state, country.