Chemistry of Life, The Journey of a Carbon Atom
Luckily you're small enough to slip through the membrane without much issue, entering the cell you see two of your best friend, you thought you'd never see them again, Its Hydrogen and Oxygen! You all join together in a big group hug and are once again inseparable (CHO.) Thinking you might need more help to figure out what's going on you look around looking for more familiar faces.