Please note this puzzle is in English. Polish version is picturedAre you interested in building a human body? Would you like to understand how the digestive system works, and see how big the human heart is and how the blood flows? This life-size. Laser Cutter Projects, Cnc Projects, Laser Cut Wood, Laser Cutting, Biology Lessons, Human Body Anatomy, Heart Pump, Wooden Puzzles, 3d Puzzles