A syringe is a simple medical tool used to inject liquids into or withdraw them from the body. It consists of a cylindrical barrel and a plunger that moves inside the barrel. Syringes are commonly used for giving vaccinations, drawing blood, or administering medications. They come in various sizes and types, depending on their specific use. Syringes are often made of plastic and are designed for single use to prevent infections. They can be found in hospitals, clinics, and even at home for people who need to manage conditions like diabetes with insulin injections. Proper disposal of used syringes is important for safety.