collarbone--anthropology

The collarbone, also known as the clavicle, is a bone that connects the sternum (breastbone) to the scapula (shoulder blade). It is considered an important bone in anthropology because it is one of the few bones in the human body that is not protected by muscle or other bones, making it more susceptible to fractures. The collarbone also plays a role in the human ability to walk upright, as it helps to stabilize the shoulder girdle and maintain posture. In terms of evolution, the collarbone is thought to have evolved in early primates as a way to support the upper body during quadrupedal locomotion, and later became important for bipedalism. The shape and size of the collarbone can also provide insight into the physical activities and lifestyles of ancient humans and other primates.