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A Dog’s Two Nostrils
Open to everyone until Tuesday, September 29
To keep it, print it while it is open.
A dog’s nose has two nostrils that work separately. By comparing what each one smells, the dog can tell which side a scent is coming from.
In the picture
- The left nostril: it takes in more scent particles when the smell comes from the left
- The right nostril: it takes in fewer particles of the same smell
- The cloud of scent drifting in from the left: its particles reach the two nostrils in different amounts
Examples
- A dog sniffing the ground can tell whether a treat rolled to its left or to its right.
- A dog following a rabbit’s trail keeps its head angled so one nostril catches more of the scent.
Key takeaways
- Each nostril sends its own signal to the brain.
- Comparing the two signals shows the direction the smell comes from.
Carry on in the app
Three questions on this lesson, to check the idea stuck. Free in the app while the lesson is in the free week.
At least one new illustrated lesson every weekday for your child’s year, with its quiz and a reminder at 6:15 pm.
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