IV bags, or intravenous bags, are flexible containers used to hold fluids that are delivered directly into a patient's bloodstream through an IV line. These bags typically contain saline, medications, or nutrients, depending on the patient's needs. They are commonly used in hospitals, clinics, and emergency settings to provide hydration, deliver medications, or supply essential nutrients. The IV bag is connected to a drip chamber and a tubing system that allows healthcare professionals to control the flow of fluid. They come in various sizes and are often made of plastic to ensure sterility and flexibility. Proper use of IV bags is crucial for effective patient care.