THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The manubrium articulates with the body of the sternum via the manubriosternal joint. The joint articulates at an angle called the angle of Louis, which allows for easy identification. The joint is a fibrocartilaginous joint or synchondrosis, which lacks a true joint cavity.

Detailed explanation-2: -Medially, the clavicle articulates with the manubrial portion of the sternum, forming the sternoclavicular joint (SC joint). This joint, surrounded by a fibrous capsule, contains an intra-articular disc in between the clavicle and the sternum.

Detailed explanation-3: -The clavicular notches of the sternum articulate with the medial end of each clavicle to form the sternoclavicular joints. The manubrium sterni also articulates with the costal cartilages of the 1st pair of ribs.

Detailed explanation-4: -The manubrium (or head) which articulates with the clavicles at the sternoclavicular joints. The superior surface of the manubrium (jugular notch) lies directly anterior to the 2nd thoracic vertebra.