The manubrium joins with the body of the sternum, the clavicles and the cartilages of the first pair of ribs. On either side of this notch are the right and left clavicular notches. This notch can be felt between the two clavicles. The suprasternal notch (jugular notch) is located in the middle at the upper broadest part of the manubrium.
It has a quadrangular shape, narrowing from the top, which gives it four borders. The manubrium ( Latin for 'handle') is the broad upper part of the sternum. In adults the sternum is on average about 1.7 cm longer in the male than in the female. It is slightly convex in front and concave behind broad above, shaped like a "T", becoming narrowed at the point where the manubrium joins the body, after which it again widens a little to below the middle of the body, and then narrows to its lower extremity. In its natural position, the sternum is angled obliquely, downward and forward. The sternum consists of three main parts, listed from the top: Its top is also connected to the sternocleidomastoid muscle. The inner surface of the sternum is also the attachment of the sternopericardial ligaments. The top of the sternum supports the clavicles (collarbones) and its edges join with the costal cartilages of the first two pairs of ribs. The sternum is a narrow, flat bone, forming the middle portion of the front of the chest. The word sternum originates from Ancient Greek στέρνον ( stérnon) 'chest'. Its three regions are the manubrium, the body, and the xiphoid process. Shaped roughly like a necktie, it is one of the largest and longest flat bones of the body. It connects to the ribs via cartilage and forms the front of the rib cage, thus helping to protect the heart, lungs, and major blood vessels from injury. The sternum ( PL: sternums or sterna) or breastbone is a long flat bone located in the central part of the chest.
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