The manubrium is the broad, upper part of the sternum, or breastbone, located at the front of the chest. It connects to the first pair of ribs and the clavicle, or collarbone, providing structural support to the ribcage. The manubrium plays a crucial role in protecting vital organs, such as the heart and lungs. Anatomically, the manubrium is shaped like a triangular plate and is about 5 centimeters long. It articulates with the body of the sternum at the sternal angle, which is an important landmark for medical professionals. Understanding the manubrium's position helps in diagnosing and treating chest-related conditions.