Sternum Definition Anatomy

The sternum in vertebrate anatomy is a flat bone that lies in the middle front part of the rib cage. A sternum appears in certain salamanders.

Question Abe6c Socratic

The long flat bone in the upper middle of the front of the chest.

Sternum definition anatomy. The sternum or breastbone is a vertical flat bone lying at the anterior middle part of the chest. 10 it probably first evolved in early tetrapods as an extension of the pectoral girdle. It is endochondral in origin.

Externally it is made up of compact bone. Inside of it is a cancellous or spongy tissue that is entirely vascular. Its origin in evolution is unclear.

Sternum definition a bone or series of bones extending along the middle line of the ventral portion of the body of most vertebrates consisting in humans of a flat narrow bone connected with the clavicles and the true ribs. It is larger in males than in females. The sternum commonly known as the breastbone is a long narrow flat bone that serves as the keystone of the rib cage and stabilizes the thoracic skeleton.

The adult length of the sternum measures 15 17 cm. Sternum definition and function. The sternum articulates comes together with the cartilages of the first seven ribs and with the clavicle collarbone on either side.

Several muscles that move the arms head and neck have their origins on the sternum. Sternum in the anatomy of tetrapods four limbed vertebrates elongated bone in the centre of the chest that articulates with and provides support for the clavicles collarbones of the shoulder girdle and for the ribs. It is not found in fish.

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