What is the difference between open and closed systems in physics and how do they impact the flow of energy and matter within a system?

In physics, open systems allow energy and matter to flow in and out, while closed systems do not allow matter to enter or leave but allow energy to flow. Open systems can exchange both energy and matter with their surroundings, while closed systems can only exchange energy. This impacts the flow of energy and matter within a system by determining whether it can interact with its environment and receive inputs or outputs.