When you close the door on your dishwasher and the action begins, what happens on the inside?

This video shows how the entire process works to get your dishes clean. I am a neat freak and want to make sure that the dishes are truly clean. I find myself scrubbing dishes before they even get to the dishwasher. It's pretty neat to seat what happens to the grit and grime and stuck on food when the water and soap hits the plates and utensils.