What is "sternum"?

The sternum, commonly known as the breastbone, is a flat and elongated bone that connects the ribcage and plays a vital role in protecting the vital organs within the chest, such as the heart and lungs. The sternum serves as an attachment point for several muscles involved in breathing and arm movements. It also contributes to the overall stability and support of the ribcage, allowing for the expansion and contraction of the chest during breathing. The sternum's position and structure are integral to maintaining proper posture and facilitating the attachment of various structures involved in upper body movement and stability.