Welcome to the world of cutting-edge science and technology, where the boundaries between imagination and reality are continually being redrawn. This book, "Introduction for Liver 3D Bioprinting," takes you on a fascinating journey through the intricate landscapes of cell biology, gene therapy, and the revolutionary field of 3D bioprinting. In the vast realm of biological sciences, the exploration of cellular mechanisms, genetic intricacies, and the architecture of living organisms has been an ongoing quest. As we delve into the microcosm of cell biology, this book unravels the mysteries of exocytosis, cell cycle regulation, and the delicate dance of molecular components such as tubulin, Bcl-2 proteins, and Notch signaling. It navigates through the complex choreography of cellular processes, from the formation of microtubules to the pivotal role of mitochondria and the orchestration of DNA repair mechanisms. The journey doesn't stop there. We seamlessly transition into the world of 3D bioprinting, where the boundaries between science fiction and reality blur. The chapters unfold the potential of 3D printing in the medical field, exploring the development of printed organs, gene therapy integration, and the materials that form the building blocks of this groundbreaking technology. The latter part of the book, specifically dedicated to liver 3D bioprinting, takes center stage. Liver, a vital organ with complex functions, becomes the focal point as we discuss the intricacies of its anatomy, the challenges in reproducing its structures, and the ethical considerations surrounding 3D printing of this organ. From disease-specific models to personalized bioprinting materials, we embark on a detailed exploration of liver 3D bioprinting and its profound impact on medical science. As the author, my aim is to provide both experts and enthusiasts with a comprehensive resource that not only delves into the depths of cellular biology and 3D bioprinting but also bridges the gap between theory and practical applications. This book is not just a compilation of facts; it's an invitation to witness the transformation of scientific theories into tangible, life-changing innovations. I hope you find this journey as intriguing and enlightening as I did while exploring the intricate tapestry of life at the cellular level and the groundbreaking possibilities that lie ahead with 3D bioprinting.