What is the function of a water jacket in the cooling system?

A water jacket in a cooling system serves to regulate the temperature of an engine or machinery by circulating coolant around hot components. It absorbs excess heat generated during operation, preventing overheating and ensuring optimal performance. The heated coolant is then directed to a radiator or cooling area, where it releases the heat before being recirculated. This process helps maintain consistent operating temperatures and prolongs the lifespan of the engine.