A Venturi system is a type of fluid flow system that utilizes a constricted flow to increase the speed of the fluid. This type of system is often used in industrial applications to create a vacuum or to measure the flow rate of a fluid. The system is composed of a nozzle, a throat, and a diffuser. The nozzle is used to increase the velocity of the fluid, while the throat is a constricted area that reduces the area of the flow. The diffuser is then used to decrease the velocity of the fluid and increase the pressure. The Venturi effect is the phenomenon that occurs when the pressure of the fluid decreases as it passes through the constricted area. This decrease in pressure causes a decrease in the velocity of the fluid, which results in an increase in the flow rate. The Venturi system is an efficient way to measure the flow rate of a fluid and is often used in industrial applications.