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Related to sternums: breastbone, sternal


see ribrib,
one of the slender, elongated, curved bones that compose the chest cage in higher vertebrates. Ribs occur in pairs, and are found in most vertebrates; however, in some lower vertebrates, including fishes, they run along the entire length of the backbone.
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the complex of skeletal elements in terrestrial vertebrates and man that unite, along the midline of the body, the ventral ends of the true ribs and parts of the pectoral girdle and to which the sternal muscles are attached.

The sternum is a derivative of the ribs and first appeared in terrestrial vertebrates when a strengthening of support for the pectoral girdle was required in connection with the progressive evolution of the forelimbs. In amphibians and reptiles the sternum is usually cartilaginous; in the latter, only a few ribs are attached, forming the thorax. In birds the sternum is osseous; in flying birds there is a median process, the keel, to which the powerful pectoral muscles are attached. In mammals the sternum consists of three sections: the manubrium, the corpus sterni, and the xiphoid process. In man the sternum, or breastbone, is an unpaired flat bone that forms the middle part of the anterior wall of the thorax.


The bone, cartilage, or series of bony or cartilaginous segments in the median line of the anteroventral part of the body of vertebrates above fishes, connecting with the ribs or pectoral girdle.


1. (in man) a long flat vertical bone, situated in front of the thorax, to which are attached the collarbone and the first seven pairs of ribs
2. the corresponding part in many other vertebrates
3. a cuticular plate covering the ventral surface of a body segment of an arthropod
References in periodicals archive ?
It is possible that the formation of the sternum and proliferation of midline angioblastic tissue may be affected by certain mechanisms during the 6th to 9th gestational weeks.
CT is the modality of choice to evaluate anatomic detail as well as pathological conditions of the sternum, sternoclavicular joints, and adjacent soft tissues (19).
Fatal cardiac tamponade resulting from a congenital sternal foramen located in the inferior part of the sternum and low thickness of sternal body was seen during the sternal puncture (15).
Anahtar kelimeler: Sternum, on-pump kardiyak cerrahi, gecikmic kapatma, kardiyak cerrahi isjemleri
The concept of the delayed sternal closure (DSC) after adult cardiac surgery was described in 1975 when Riahi and associates reported the use of external traction of the sternum to minimize postoperative tamponade conditions (1,2).
Major bleeding was the reason of DSC in 13 patients because of difficult or unsatisfactory hemostasis, combined with a risk of tamponade if the sternum were closed primarily.