Home > Science > Living things > Skeletons and muscles
Which part of your skeleton protects your brain?
Which part of your skeleton protects your heart and lungs?
As you grow, your skeleton ...
stays the same size
Which of these animals has its skeleton on the outside of its body?
How does your arm bend up and down?
One muscle pulls your arm up and another muscle pulls your arm down
One muscle pulls your arm up and the same muscle pushes your arm down again
The bones inside your arm move on their own
Muscles always work in pairs. When one contracts, the other ...
Which of these things is NOT true about your skeleton?
It supports and protects your body
It makes you grow
It helps you move
Why do you think some animals, like crabs and insects, shed their outer skeletons?
Because they get too hot
Because their skeletons get too loose
Because their skeletons don't grow