The structure is as follows:
The emergence of syringes was an epochal revolution in the field of medical devicesThe process of extracting or injecting a gas or liquid with a needle is called injection.
The syringe consists of a barrel with a small hole in the front and a matching piston mandrel, which is used to inject small quantities of liquid or gas into or withdraw it from areas that are inaccessible by other means. The liquid or gas is drawn in through the hole in the front of the barrel when the mandrel is withdrawn, and is squeezed out when the mandrel is pushed in.
Expanded Information
Model Size
Typically, 2 ml, 5 ml, 10 ml, or 20 ml syringes are used, occasionally 50 ml or 100 ml, and 1 ml syringes are used for intradermal injections.
Syringe barrels can be made of either plastic or glass and usually have a graduated indication of the volume of fluid in the syringe. Glass syringes can be sterilized with an autoclave, but because plastic syringes are cheaper to dispose of, most modern medical syringes are made of plastic, which further reduces the risk of blood-borne diseases. The spread of disease among intravenous drug users, especially HIV and hepatitis, has been linked to the reuse of needles and syringes.
Baidu Encyclopedia - Syringes