What is the definition of the sternum?

The definition of the sternum is accurately described as the bone connecting the clavicles and the first seven ribs. The sternum, commonly referred to as the breastbone, is a flat, elongated bone located in the center of the chest. It serves as an important structural component in the rib cage, providing protection to the heart and lungs while also acting as an attachment point for various muscles involved in respiratory movements.

This definition is consistent with anatomical terminology, as the sternum directly articulates with the clavicles (collarbones) at the sternoclavicular joints and provides connection points for the first seven pairs of ribs via costal cartilage. The sternum's structural contributions are critical in forming the anterior part of the thoracic cavity, reinforcing its importance in both protection and support.

Understanding the role and location of the sternum can help visualize its function within the skeletal system, especially in relation to breathing and the overall mechanics of the rib cage.