How is liquid entered into syringe?

To draw liquid into a syringe, first, ensure the syringe is sterile and the plunger is fully depressed. Insert the needle into the liquid, then pull back the plunger slowly to create a vacuum that draws the liquid into the barrel. Once the desired amount is collected, remove the needle from the liquid, expel any air bubbles by gently pushing the plunger, and securely cap the needle if necessary.