GROSS ANATOMY

Detailed explanation-1: -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-2: -The manubrium articulates with the body of the sternum by way of the manubriosternal joint at the angle of Louis. The manubriosternal joint is a fibrocartilaginous joint or synchondrosis, which lacks a true joint cavity. The joint allows protraction and retraction of the thorax.

Detailed explanation-3: -The manubrium is the most superior portion of the sternum that articulates with the clavicle-forming the sternoclavicular (SC) joint.

Detailed explanation-4: -The clavicle is an anterior bone whose sternal end articulates with the manubrium of the sternum at the sternoclavicular joint.

Detailed explanation-5: -The first seven ribs are termed true ribs and attach to the manubrium and directly attach to the body of the sternum. Ribs eight to ten only attach to the inferior part of sternum via the costal cartilages. Ribs 11-12 are termed floating ribs because they do not attach directly to the sternum.