B C B C What Is the Skeletal System 4 Joints 8 How Bones Help You Move 10 Bones Protect Organs 12 What’s Inside Bones 18 Glossary 22 To Learn More 23 Index 24
What Is the Skeletal System 4
5 Move your bones When you walk run or dance your skeletal system is helping you move The bones in your skeletal system also give your body its shape and protect many of your organs Babies are born with more than 300 bones Over time bones grow in size and many grow together to form the adult skeleton which has 206 bones
