The term "sternocostal" refers to the anatomical relationship between the sternum and the costal cartilages. The sternum, commonly known as the breastbone, is a flat bone located in the center of the chest. The costal cartilages are flexible tissues that connect the ribs to the sternum, allowing for movement during breathing. Sternocostal joints are the points where the costal cartilages attach to the sternum. These joints play a crucial role in the expansion and contraction of the rib cage during respiration, facilitating the process of inhaling and exhaling air into the lungs.