An insulin syringe is a medical device used to inject insulin, a hormone that helps regulate blood sugar levels in people with diabetes. These syringes are typically made of plastic and have a fine needle to minimize discomfort during injection. They come in various sizes, allowing users to measure and administer precise doses of insulin. The syringe consists of a barrel, plunger, and needle. The barrel holds the insulin, while the plunger is pushed to draw the insulin into the syringe and then inject it into the body. Proper disposal of used syringes is essential to prevent needle-stick injuries and maintain safety.