Cadaver dissection has been fundamental to the development of surgery, providing the anatomical insight required for precise tissue manipulation and restoration of form and function. In antiquity, cultural and religious prohibitions limited human dissection, restricting surgical knowledge to animal models and surface anatomy. The Renaissance marked a pivotal shift, with systematic cadaveric dissection by figures such as Vesalius redefining anatomical accuracy and challenging long-held misconceptions. As reconstructive techniques evolved, particularly following wartime injuries of the nineteenth and twentieth centuries, detailed understanding of vascular anatomy, tissue planes, and flap physiology became essential. Cadaveric study enabled the mapping of angiosomes, perforators, and neural pathways, directly informing the development of local, regional, and free flap reconstruction. In the modern era, cadaver dissection remains central to surgical training, innovation, and patient safety, complementing imaging and simulation technologies. Ethical frameworks, donor programs, and preservation techniques have further expanded its educational value. This historical overview underscores cadaver dissection as a cornerstone of surgery, demonstrating how direct anatomical study has continually driven surgical innovation and remains indispensable in contemporary practice.