The Bundles of Energy
Science Factfile
- Muscles are bundles of cells and fibers.
- Muscles work in a very simple way. All they do is tighten up–that is, contract–and relax.
- You have two sets of muscles attached to many of your bones which allow them to move.
- There are 630 active muscles in your body and they act in groups.
- Muscles can only pull. They never push.
Websites
- KidsHealth: Your Muscles
- Your Gross and Cool Body: Muscular System
- Science Bob: Muscular System
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thanks this is awsome
Wowowowowowow… Thanks.
this is kind of weard i did know we had 640 musculs!
awesome
SO MANY AWESOME FACTS YEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH