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Schematic representation of modified 3D printer Prusa I3. The main components include: (A) linear actuator designed to push syringe plunger; (B) syringe containing Matrigel; (C) syringe housing; (D) stepper motor; (E) ball screw; (F) syringe plunger holder connected to the ball screw to achieve movement; (G) syringe holder; (H) linear actuator structure; (I) adapter to connect the linear actuator to the 3D printer moving part; (L) M8 threaded rod with a 2 mm pitch.
