Bipedalism

Bipedalism Approximately 350 million eld ago, hominids acquired the characteristic of bipedalism, that is, walking upright, on two feet. Evidence ranging from 4 to 3 million long time ago help us to better understand how and thence this acquired characteristic took place. Keeping in mind however, that mostly solely primates can sit or stand up straight and many can even walk upright, although not for long, the differences in fossil records are minor yet peremptory pieces of evidence. betimes hominid fossils resemble those of modern day monkeys, however, with much than fossils and evidence found, we see the structure change in their bodies. early(a) footprints evidencing a focused toe and well-developed arches were found at Laetoli, on a paleosurface tuff dated to 3.56 ±0.2 mya (Jacobs). This is one we discussed in class and is very important, I believe, in proof of bipedalism. The focussed toe is important because it shows that feet were being used less to mesmerise objects and more for walking. The toe began to move inward, toward the other toes, spareing ease and lodge on two feet. The arch was derived from the walking, used as a shock-absorber. An arch is needed for bipedal walking because flat-footedness would not discontinue hominids to walk very far or fast at one time which is exactly what they were doing.

Moving further up on the body brings us to the legs and pelvis. The legs of a “knuckle-walker” differ from those of a bipedal walker in part of locking knees. world have the superpower to lock our knees to keep us in place, however, chi mps and early primates do not have the worl! d power to do so, therefore must use muscle to return themselves up. The pelvis in early primates hold the craniate at a slightly different angle than that of a modern human. As hominids began walking upright, the pelvis began to take a bowl shape, supporting the visceral organs. This was seen in the fossils of Lucy the clearest. Further up on the body is our arms which are...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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