Mon Prof Augmenté
Same Bones, Different Jobs
Humans, whales, bats, and horses have forelimbs built from the same set of bones. Those bones are shaped and sized differently for grasping, swimming, flying, or running.
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Age 12: open this week
Browse Age 12
In the picture
- Badge 1 sits on the red upper bone of the human forelimb.
- Badge 2 sits on the blue forearm bones of the bat wing.
- Badge 3 sits on the green wrist bones of the whale flipper.
- Badge 4 sits on the purple finger bones of the horse foreleg.
Examples
- Your hand and a bat’s wing both contain finger bones, but a bat’s fingers are long and support its wing.
- A whale flipper and your arm both have an upper bone, forearm bones, wrist bones, and finger bones.
Key takeaways
- The same bone pattern can be reshaped for very different ways of moving.
- Similar limb bones in different animals point to shared ancestry.
Carry on in the app
Three questions on this lesson. It has left the free week, so its quiz is for subscribers.
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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