Main Page | See live article | Alphabetical index The vomeronasal organ, also called Jacobson's organ, is a chemoreceptor organ named for its closeness to the vomer and nasal bones, and is particularly developed in animals such as cats and horses, who adopt a characteristic pose called the flehmen reaction or flehming when making use of it, and is thought to have to do with the perception of certain pheromones. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.