Question

In addition to the olfactory mucosa, the nose contains another sense organ, the vomeronasal organ, which is common in mammals but until recently, was thought nonexistence?

Answer 1

The vomeronasal organ, also known as Jacobson's organ, is an olfactory organ found in many vertebrate animals. It is sensitive to pheromones and is connected to the nasal cavity by a duct. The organ is commonly found in mammals.

Step-by-step explanation:

The vomeronasal organ (VNO), also known as Jacobson's organ, is an olfactory organ found in many vertebrate animals. It is connected to the nasal cavity by a duct and is highly sensitive to pheromones. When molecules dissolve in the mucosa of the nasal cavity, they enter the VNO, where pheromones bind to specialized receptors. This organ is commonly found in mammals, including cats, who display the flehmen response to help pheromone molecules enter the VNO.