Buses, trains and planes may transport us from one place to another, but how are vital substances transported into the cells that travel around our bodies? In this BrainPOP UK movie, Tim and Moby explain what active transport is, what its function is in the body, how it works and even some examples of it in use! In this educational, animated movie you’ll learn about a process called diffusion. Find out how cells can use their own energy plus special proteins to move substances across their membrane. Plus, find out which substances are able to move through gaps in a cell membrane without requiring any effort from the cell. You’ll also discover the main source of cell energy, and the way in which your white blood cells kill germs. So climb aboard and watch this movie!