Are you ready to pump some iron? In this BrainPOP UK movie, Tim and Moby examine the muscular system and how our bodies move. In this educational, animated movie you’ll learn the basic types of muscles and the different ways they look and work. See exactly how you can consciously control some parts of your body to do different things like move bones or show expressions on your face, and how the heart pumps as an involuntary muscle. Discover how your skeletal muscles attach to your bones and why your muscles need to contract and relax. Plus, find out what kind of sugar powers your muscles, as well as what your muscles need to prevent cramping. Alright, let me see you flex!