How does a broken bone heal? What is cartilage? Which muscle is the biggest? You walk, run, jump, and play, but did you ever think about why you are able to do this? This book explains how bones, cartilage, muscles, and joints work together to move our bodies.
Table of Contents
What do bones do? Why do bones break? Do bones bleed? How fast do bones grow? Why do my knees bend but not twist? Why do my knuckles crack? What do muscles do? Which muscle is the largest? Why do I get cramps.