A Disposable Syringe is basically a simple pump consisting of a plunger which fits tightly in a tube. The plunger can be pulled and pushed along inside a cylindrical tube (called a barrel), which allow the syringe to take in and expel a liquid or gas via an orifice at the open end of the tube. The open end of the syringe may be fitted with a hypodermic needle, a nozzle, or tubing to help direct the flow into and out of the barrel. Disposable Sterile is widely used in Clinical application, and is often used to administer injections, insert intravenous drugs into the bloodstream, apply compounds such as glue or lubricant, and measure liquids.