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Human body

Grade 4 · Science · Free lesson

Hello there! I'm Studyfin, your science buddy. Today, we are going to explore the incredible skeleton that supports your body!

Did you know that you have a super strong frame inside your body? It is called your skeleton, and it is made of bones!

Your skeleton acts like the wooden frame of a house. It holds you upright so you don't turn into a puddle of jelly on the floor!

Without bones vs. With bones

Bones also protect your soft inside parts. For example, your hard, round skull acts like a natural helmet to protect your brain.

Skull protects your brain!
✏️ Worked example

How do our bones help us move our arms and legs?

  1. 1. Bones are hard and cannot bend on their own.
  2. 2. Two or more bones meet at special places called joints (like your elbow or knee).
  3. 3. Strong muscles are attached to these bones.
  4. 4. When your muscles pull on the bones, the joints bend, allowing you to walk, run, and wave!
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