Buna is a census-designated place in Jasper County, Texas, United States. The population was 2,142 at the 2010 census.
Gas Exchange. Gas exchange is the process by which oxygen and carbon dioxide (the respiratory gases) move in opposite directions across an organism's respiratory membranes, between the air or water of the external environment and the body fluids of the internal environment.
An exchange is a specified area which usually encompasses a city, town or village and its environs. Local Toll (intraLATA) Service Local toll service (also called intraLATA, local long distance, or regional toll service) provides calling within a geographic area known as a Local Access and Transport Area (LATA). Per-minute toll charges usually apply to these calls.