A syringe is a pump with a tightly fitting piston (or plunger) inside a calibrated glass or plastic cylinder known as a barrel. To help direct medication delivery, a 10ml syringe with needle, nozzle, or tubing is attached to the syringe.

https://cheappinz.weebly.com/home/5-tips-for-staying-safe-when-youre-living-alone-with-diabetes