Explain the function of stemum

The sternum, or breastbone, is a flat bone located in the center of the chest. It serves as a vital component of the ribcage, providing attachment points for the ribs and helping to protect the heart, lungs, and major blood vessels. Additionally, the sternum plays a role in the respiratory system by allowing for the expansion of the thoracic cavity during breathing. Its structure also aids in maintaining the integrity of the chest wall.