CHAPTER TWO
Your Bones
There are bones under your skin. These bones make your skeleton. Your skeleton helps you to stand up.
There are joints in your skeleton, too. Bones meet at joints. Elbows and knees are joints. Joints help you to move. Knee joints help you to jump and kick.
A baby has small bones. Bones grow and they make you big and tall.
Your bones stop growing when you are about 20 years old. Then there are 206 bones in your body!
Protect your bones! When you ride a skateboard, wear pads to protect your bones and joints. Wear a helmet to protect your head, too.
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