However, cell signaling may also occur between the cells of two different organisms. In many mammals, early embryo cells exchange signals with cells of the uterus. In the human gastrointestinal tract, bacteria exchange signals with each other and with human epithelial and immune system cells.
Mount Vernon is a city in and the county seat of Posey County, Indiana, United States, in the state's far southwestern corner. The population was 6,687 at the 2010 census. It is located in Black Township and is part of the Evansville, Indiana, metropolitan area, which had a 2000 population of 342,815.
Mount Vernon is a city in Skagit County, Washington, United States. The population was 31,743 at the 2010 census. It is one of two principal cities of and included in the Mount Vernon-Anacortes, Washington Metropolitan Statistical Area. It is the county seat of Skagit County. Downtown Mount Vernon is known for its annual Tulip Festival Street Fair, which is part of the Skagit Valley Tulip Festival.