One design achieves this by creating a plunger that inserts itself into the syringe neck to expel as much fluid as possible from the syringe body, thus reducing the amount of space available within the neck.
One design achieves this by. One design was creating a plunger. This plunger inserts itself into the syringe neck, thus reducing the amount of space available within the neck. This was to expel as much fluid as possible from the syringe body.