ANHB1102 Lecture Notes - Lecture 7: Acetabulum, Bipedalism, Waste Heat
4 Dec 2018
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Sacri ced other options for it eg. climbing. Many other bipedal animals are not fully upright and so have a long tail for balance eg. - extension and hyperextension of hip. Longer stride and balance on 2 limbs bene ts ef cient walking over at ground. Chimps with longer hind limb"s walking bipedal show increased energy ef ciency over those with shorter hindlimb"s. Suggestion it helps with rough terrain (high tectonic activity) - helps to avoid predation. Major structural adaptations due to selective pressures: allows endurance running - unique function. Savannah environment = change in behaviour = structural change. Reach lower temperature air (well above the ground) Greater energy ef ciency requires minimisation of waste heat and water saving. Human bipedalism is 75% less costly than both quadrupedal and bipedal walking in chimps. Trees separated by open country as environment dried. Had to move to ground out of trees.
