The primary function of the ribcage is to protect vital organs, particularly the heart and lungs, while also providing structural support for the thoracic cavity. Comprised of several pairs of ribs, vertebrae, and the sternum (breastbone), the ribcage creates a protective barrier that guards against physical trauma. Additionally, the ribcage plays a crucial role in respiration by enabling the expansion and contraction of the lungs during inhalation and exhalation. This movement is facilitated by the intercostal muscles located between the ribs, demonstrating the ribcage's dual role in both protection and respiratory function.