In many ways, your body is like a wonderful machine. Each of the many different parts of your body has a special job to do. Your bones and muscles work together to make you move. Your heart pumps blood round and round your body. Your lungs take in a gas called oxygen from the air. The most complicated part of your body is your brain, which controls all the other parts.rnMachine need fuel to makā¦
The contens are: perpetual motion; forces in action; rubbing and rolling; a machine for war; slopes and wedges; twisting and turning; moving in circles; cogs and wheels; on two wheels; pullinng and lifting; feeding machines with energy; getting up steam; machines to make machines; electric motors; a macine that files; reaching the fire; pumping petrol; piston power; ........