National Institutes are specialized research organizations in the United States that focus on specific areas of health and science. They are part of the National Institutes of Health (NIH) and aim to advance knowledge through research, training, and the dissemination of information. Each institute targets particular diseases or health issues, such as cancer, heart disease, or mental health. These institutes provide funding for research projects, support scientists, and promote public health initiatives. They also collaborate with universities, hospitals, and other organizations to enhance scientific understanding and improve health outcomes for the population.