Flow diagram is a collective term for a diagram representing a flow or set of dynamic relationships in a system. As the below Worm Exercise Flow Diagram suggests, flow diagrams are used to structure and order a complex system or to reveal the underlying structure of elements and their interaction. The below flow diagram starts with day one of an adult worm and goes up to OP-50 seeded plates. To seed plates, dispense 100-120 μl of the OP50 onto the 60 mm diameter NGM Petri plate and swirl to spread it. Incubate these seeded plates overnight at room temperature for the lawn to grow.