Animal models refer to the use of animals in scientific research and experimentation to study various aspects of biology, behavior, physiology, and disease. These models are used to mimic human diseases and conditions in order to gain insights into their underlying mechanisms and develop potential treatments or therapies. Animal models play a crucial role in biomedical research, as they provide a way to study complex biological processes in a controlled environment. Commonly used animal models include mice, rats, rabbits, and non-human primates. Researchers use these models to investigate a wide range of topics, from genetics and neuroscience to cancer and infectious diseases. Animal models have been instrumental in advancing our understanding of various diseases and have led to the development of numerous medical treatments and interventions. However, ethical considerations and concerns about the validity of animal research continue to be important issues in this field.