What does vomeronasal organ mean?

Definitions for vomeronasal organ

Here are all the possible meanings and translations of the word vomeronasal organ.


  1. Vomeronasal organ

    The vomeronasal organ, or Jacobson's organ, is an auxiliary olfactory sense organ that is found in many animals. It was discovered by Frederik Ruysch and later by Ludwig Jacobson in 1813. This organ is the sense organ involved in the flehmen response in mammals. The VNO is the first stage of the accessory olfactory system, and contains sensory neurons that detect chemical stimuli. The axons from these neurons project to the accessory olfactory bulb, which targets the amygdala and bed nucleus of the stria terminalis, which in turn project to the hypothalamus. The vomeronasal organ is mainly used to detect pheromones, chemical messengers that carry information between individuals of the same species. As with other olfactory systems, chemical messages are detected by their binding to G protein-coupled receptors. The neurons in the VNO express receptors from 3 families, called V1R, V2R, and FPR. The receptors are distinct from each other and from the large family of receptors in the main olfactory system. Stimuli reach the VNO in liquid phase via a pumping mechanism; the primary cues for the VNO are therefore non-volatile and require direct physical contact. Its presence in many animals has been widely studied and the importance of the vomeronasal system to the role of reproduction and social behavior has been shown in many studies. Its presence and functionality in humans was controversial, though most studies agree the organ regresses during fetal development. Many genes essential for VNO function in animals are non-functional in humans. Chemical communication does appear to occur among humans, but this does not necessarily imply that the human vomeronasal organ is functional.

U.S. National Library of Medicine

  1. Vomeronasal Organ

    An accessory chemoreceptor organ that is separated from the main OLFACTORY MUCOSA. It is situated at the base of nasal septum close to the VOMER and NASAL BONES. It forwards chemical signals (such as PHEROMONES) to the CENTRAL NERVOUS SYSTEM, thus influencing reproductive and social behavior. In humans, most of its structures except the vomeronasal duct undergo regression after birth.


  1. Chaldean Numerology

    The numerical value of vomeronasal organ in Chaldean Numerology is: 8

  2. Pythagorean Numerology

    The numerical value of vomeronasal organ in Pythagorean Numerology is: 1

Images & Illustrations of vomeronasal organ

  1. vomeronasal organvomeronasal organvomeronasal organ


Find a translation for the vomeronasal organ definition in other languages:

Select another language:

Discuss these vomeronasal organ definitions with the community:

Word of the Day

Would you like us to send you a FREE new word definition delivered to your inbox daily?

Please enter your email address:     


Use the citation below to add this definition to your bibliography:


"vomeronasal organ." Definitions.net. STANDS4 LLC, 2018. Web. 22 Apr. 2018. <https://www.definitions.net/definition/vomeronasal organ>.

Are we missing a good definition for vomeronasal organ? Don't keep it to yourself...

Nearby & related entries:

Alternative searches for vomeronasal organ:

Thanks for your vote! We truly appreciate your support.