TWIN PATHWAYS INTO THE BRAIN

TWIN PATHWAYS INTO THE BRAIN

Diagram of the Human Nose
The centimeter-long human vomeronasal organ (VNO), shown sliced in two in the photograph below acts as a sensor for airborne human pheromones-odorless molecules that influence sexual desire and other feelings. The molecules set off signals that are transmitted through the VNO nerves (red) directly to the hypothalamus. Smell messages travel through the parallel olfactory system (blue) to a different part of the brain...(diagram of the human nose)
Diagram-of-human-nose.