Cho Dong-woo, professor of mechanical engineering at Pohang University of Science and Technology, and Choi Young-jin, Ph.D. in bioengineering work together to create the world's first artificial muscle that is nearly identical to human muscle using 3D cell printing technology. Many researchers have already done making personal medical devices using 3D printing technology to make artificial organs. Because materials are harmful to humans, it's still a long way to make artificial organs replace real human organs. The research results at South Korea University are noteworthy, mainly because the newly manufactured artificial muscles can mimic the structure and characteristics of skeletal muscle. Skeletal muscle is the body's muscles near the bones, in many forms. Some muscles are unconscious muscles, such as the heart, it can not control muscle activity, skeletal muscle is not the same, the stimulation of electrical signals, skeletal muscle can perform many actions with different intensity. If you want to replace skeletal muscle, artificial muscles must have a variety of different shapes and sizes, can easily shrink and relax. In the past, researchers used to make artificial muscles, such as collagen, to fill the mold, but this method took a long time and was poorly targeted to the patient. The old method of making artificial muscles, can not regulate cells, these cells can make muscle regeneration, indispensable. There are also restrictions on the materials used in the manufacture of the material can not cause harm to the human body, the material will also help the real growth of muscle cells, providing the environment for muscle fiber regeneration. It is for this reason that researchers from South Korea University find another way to extract biological inks from real skeletal muscle and then make artificial muscles using 3D cell printing technology. Artificial muscles made with the new method have better elasticity and can effectively receive electrical signals and simulate the function of real muscles. Professor Cho Dong-woo said: "If made using 3D cell printing technology and muscle bio-ink, artificial muscles can simulate the structure and function of real muscles and ultimately can be used to develop new drugs to treat muscle diseases."