a pair of six millilitre syringes

air blood bloodstream centimetre clinical cross cubic cylinder cylindrical discharge disposable doctor draw expel extract fluid food gas glass infection infuse inject injection injections injector injectors insulin liquid litre measure measurement medical medicine millilitre needle needles nozzle nurse orifice pair piston pistons plastic plunger plungers press pull pump pumps push reciprocate reciprocating safety sterilize sterilized suck syringe syringes thousandth tube tubes tubing two unit vessel volume