Mon Prof Augmenté
Warm Core, Cool Fingers
Your body sends blood to the brain and heart first, so your hands and feet can feel cold. The tiny blood vessels in your fingers and toes get narrower to save heat.
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In the picture
- The glowing chest inside the torso.
- The narrow blood vessel inside the enlarged fingertip view.
- The narrow blood vessel inside the enlarged toe view.
Examples
- Holding a snowball makes your fingers sting with cold.
- Walking barefoot on a cold floor makes your toes feel icy.
Key takeaways
- Your body keeps the brain and heart warm before the hands and feet.
- Narrow blood vessels let less warm blood reach the fingers and toes.
Carry on in the app
Three questions on this lesson. It has left the free week, so its quiz is for subscribers.
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