Vomeronasal organ

Vomeronasal Organ

The Vomeronasal Organ (VNO), also known as 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 part of the olfactory system used for pheromone detection.

Structure

The Vomeronasal organ is a tubular structure located in the anterior part of the nasal septum, close to the floor of the nasal cavity. It is separated from the main olfactory system and has its own sensory epithelium, which contains receptor cells that are different from those in the main olfactory epithelium.

Function

The primary function of the Vomeronasal organ is the detection of pheromones, chemical signals that carry information between individuals of the same species. This organ plays a crucial role in the behavioral and physiological responses to these chemical signals, including mating and aggression behaviors.

In Humans

The existence and functionality of the Vomeronasal organ in humans is a controversial topic. While some studies suggest that this organ is present and functional in adults, others argue that it regresses during fetal development and is non-functional in adults.

See Also

• Olfactory System
• Pheromones
• Nasal Septum

References

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