The National Heart, Lung, and Blood Institute (NHLBI) is a part of the U.S. Department of Health and Human Services. It focuses on research and education related to heart, lung, and blood diseases. The institute aims to improve health by advancing knowledge and promoting effective treatments for conditions such as heart disease, asthma, and anemia. NHLBI supports various research initiatives and clinical trials to better understand these diseases. It also provides resources and information to the public and healthcare professionals, helping to raise awareness about prevention and management strategies for cardiovascular and respiratory health issues.