Mon Prof Augmenté
Giraffe Bending to Drink
Age 12 · Biology
A giraffe lowers its long neck to a pool. Special neck arteries and one-way valves keep blood moving to its head so it does not faint.
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Every lesson is open to everyone for 7 days after it is published. This one came out on September 12, 2026: its text stays readable here, and its picture opens with a subscription.
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In the picture
- Heart in the chest cutaway
- Lower neck artery
- One-way valve inside the artery
- Upper neck artery
Examples
- Your veins have one-way valves that help blood move from your feet back to your heart.
- A one-way gate lets people leave a stadium but stops them from going back in.
Key takeaways
- Giraffes have special neck arteries that reduce blood pressure when the head is low.
- One-way valves keep blood moving upward instead of slipping back down.
Quiz: Giraffe Bending to Drink (Age 12)
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Why does a giraffe not faint when it lowers its head to drink?
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What do the one-way valves in a giraffe’s neck arteries do?
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How do the special neck arteries help a giraffe when it bends down?
The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.
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