Vomeronasal organ
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The vomeronasal organ, or Jacobson's organ, is the paired auxiliary olfactory sense organ located in the soft tissue of the nasal septum, in the nasal cavity just above the roof of the mouth in variou
Stallion exhibiting the flehmen response
Flehmen response
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The flehmen response, also called the flehmen position, flehmen reaction, flehmen grimace, flehming, or flehmening, is a behavior in which an animal curls back its upper lip exposing its front teeth,
Vomeronasal organ
…stria terminalis, which in turn project to the anterior hypothalamus. These structures constitute the accessory olfactory system. The VNO triggers the flehmen response in some mammals, which helps direct liquid organic chemicals to the organ. The VNO was discovered by Frederik Ruysch prior to 1732, and later by Ludwig…
Flehmen response in a horse
Flehmen response in a Sumatran tiger
Flehmen response in a tapir
Flehmen response in an elk