Understanding your muscles & bones (Usborne science for beginners)

Understanding your Muscles & Bones looks under your skin to reveal the parts of your body that let you run and jump around.See how your skeleton fits together and how your muscles make it move. Find out about the muscles that never stop working- the ones which make you breathe and keep your heart beating. Take a look at how exercise and training improve your muscles and make you fitter and stronger. Discover how you grow and how broken bones mend.