human
I'm trying to find out the difference between a syringe and a needle.
assistant
A syringe is a hollow tube that is used to transfer fluids from one place to another, usually by pushing or pulling the fluid through the tube. It typically has two openings at opposite ends of the tube, called ports, which are connected to a plunger and a piston. The plunger is moved up and down within the tube to create suction or pressure, while the piston seals off one end of the tube and pushes the fluid towards the other port.