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Dog’s Second Smell Organ
Age 16 · Animals
Dogs have a special sac above the roof of the mouth that detects pheromones. These chemical messages carry information about another animal’s identity, sex, and reproductive state.
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Age 16: open this week
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In the picture
- The vomeronasal organ above the mouth roof: a sac that receives pheromone molecules.
- The nostril: an opening where airborne molecules enter the nasal passage.
- The thin nerve pathway: a route that carries signals from the sac toward the brain.
- The brain: the region that receives and interprets the signals.
Examples
- A dog sniffs a spot where another dog urinated.
- A dog greets another dog by sniffing its rear.
Key takeaways
- The vomeronasal organ is separate from the main smell system.
- It detects pheromones that can reveal identity, sex, and reproductive state.
Quiz: Dog’s Second Smell Organ (Age 16)
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What does the vomeronasal organ detect?
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What can pheromones reveal about another animal?
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What is the vomeronasal organ separate from?
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