Cadaver models are used in research to simulate the human body for studying various medical procedures, anatomy, and pathology. These models are created using preserved human cadavers or body parts, which provide a realistic representation of the human body's structure and physiology. Cadaver models are often used in medical education and training, as well as in research studies to better understand the human body and improve medical practices. The use of cadaver models allows researchers to study complex anatomical structures and practice surgical procedures in a controlled and realistic environment.