(1999) How many bones are there in the human body? Which bone is the longest? Or the smallest? Without bones, you would be a blob, like a jellyfish or a worm. Our bones support us and protect our insides. They work together with our muscles to allow us to do all the things we do! So when you think of your bones, say “Thank you!” This simple Step 2 introduction teaches young readers these facts and many more about the skeleton inside each of us!