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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 ?
Another way to speed healing of the breastbone has to do with the initial incision rather than how it's secured.
11, that the GSK-3ss protein participates in palate development and breastbone formation at different times.
Internationally recognized for his pioneering work in minimally invasive heart surgery, his investigations and innovations allow surgery to be done inside the heart through small incisions rather than through large traditional cuts that split the breastbone or the ribs.
ANDREAS SUBORICS, who suffered a broken breastbone and crushed ribcage in a fall at Kyoto, Japan, on Saturday, was operated on yesterday.
With this smart garment, ECG signals can be picked up by the sensors visible on the garment in the breastbone.
Now do the same exercise with your hands placed at the bottom of your breastbone and breathe the same way.
The most common side effects observed with the device were pain beneath the breastbone that usually diminished within two weeks, temporary difficulty swallowing, fever, and sore throat.
Masaru Umezu, 56, sustained serious burns to the face and hands, while Koichi Okada, 42, broke his breastbone.
In conventional bypass surgery, a doctor cuts a 30.5-centimeter (12-inch) incision from neck to abdomen, then saws into the breastbone and cracks open the ribcage to expose the heart.
Then angle the blade upward, under the breast, parallel to the carcass, until you hit the vertical breastbone. Slice the breast parallel to the carcass (d); the base cut lets slices separate neatly.
Circulation - check for pulse; if there isn't one take the heel of both hands and press down on the breastbone at a rate of one compression a second; continue until paramedics arrive.
Whether the hog has been stunned or not it should be turned over on its back and the knife inserted toward the breastbone, holding the knife parallel to the ground.