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A simple piston pump consisting of a plunger that fits tightly in a tube. The plunger can be pulled and pushed along inside a cylindrical tube (the barrel), allowing the syringe to take in and expel a liquid or gas through an orifice at the open end of the tube.

Early Model Syringe

A simple piston pump consisting of a plunger that fits tightly in a tube. The plunger can be pulled…