Thoracic cavity: Thoracic cavity, the second largest hollow space of the body. It is enclosed by the ribs, the vertebral column, and the sternum, or breastbone, and is separated from the
Map of ZIP Code. ZIP code 92407 is centered in San Bernardino County and overlaps Medical Service Study Area(s) 151e, 151e, 151g, 151g, 146, 146, 147, 147, 148 and 148.
As one of the Inland Empire's anchor cities, San Bernardino spans 81 square miles (210 km2) on the floor of the San Bernardino Valley, and has a population of 209,924 as of the 2010 census. San Bernardino is the 17th largest city in California, and the 99th largest city in the United States.