What does jawbone mean?

Jaw refers to the bone above the chin. Can be divided into maxilla and mandible. There is a fissure between the maxilla and sphenoid bone called infraorbital fissure. The mandible, condyle and mandibular fossa form a joint with the articular tubercle of the temporal bone, which is called temporomandibular joint (movable).

Jaw is located at the back of nasal cavity, between the maxilla and pterygoid process of sphenoid bone, and participates in the formation of nasal cavity floor and lateral wall, palate, orbital floor, pterygopalatine fossa and infraorbital fissure. Jaw is divided into horizontal and vertical parts.

1993 10 10 In late October, paleontologists from Germany, the United States and Malawi discovered a 2.5 million-year-old human jawbone fossil near the west bank of Lake Malawi in East Africa. According to the British magazine Nature, this jawbone fossil is one of the oldest human fossils found.

Extended data:

Early jawbone

Jaw bones found in remote areas of Ethiopia in Africa are expected to fill the gap in the evolution of the early two generations of human beings. This jawbone and other discovered fossils were formed about 3.8 million to 3.5 million years ago. It happened that Australopithecus afarensis evolved into Australopithecus afarensis from 4.2 million years ago to 3.9 million years ago. Archaeologists hope that the skeleton fossils discovered this time can make up for the lack of evolution between these two generations.

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