write about Sternum
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Sternum :
Sternum is a flat bone present on the ventral midline of the thorax. It is present just under the skin in the middle the chest. The sternum forms protecting covering which protects the internal organs present in the thoracic region. It provides the surface where muscles attach and help in the respiratory mechanism.
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Explanation:
☞ Sternum.
The sternum or breastbone is a long flat bone located in the central part of the chest. 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. Shaped roughly like a necktie, it is one of the largest and longest flat bones of the body. Its three regions are the manubrium, the body, and the xioid process.[1] The word "sternum" originates from the Greek στέρνο, meaning "chest.
✎ Sternum in Others animals.
The sternum, in vertebrate anatomy, is a flat bone that lies in the middle front part of the rib cage. It is endochondral in origin.[10] It probably first evolved in early tetrapods as an extension of the pectoral girdle; it is not found in fish. In amphibians and reptiles it is typically a shield-shaped structure, often composed entirely of cartilage. It is absent in both turtles and snakes. In birds it is a relatively large bone and typically bears an enormous projecting keel to which the flight muscles are attached.[11] Only in mammals does the sternum take on the elongated, segmented form seen in humans.