The Human Skeleton: Evolution for Walking

The video explains the evolution of the human skeleton from an ape-like structure to modern humans. It highlights changes in bone length and skull shape, which facilitated bipedalism. Walking on two legs allowed humans to use their hands for other tasks, such as hunting and tool-making, providing energy efficiency and adaptability.

How did the human skeleton evolve over millions of years?

• From a fish-like structure to a bird-like structure

• From an ape-like structure to a modern human structure

• From a reptile-like structure to a mammal-like structure

• From a dinosaur-like structure to a bird-like structure

What significant changes occurred in the human skeleton over time?

• The arm bones became thicker and the skull shrank

• The leg bones lengthened and the skull changed shape

• The leg bones shortened and the arm bones lengthened

• The spine became longer and more flexible

What is the term used to describe walking on two legs?

• Tripedalism

• Bipedalism

• Unipedalism

• Quadrupedalism

Why was walking on two legs advantageous for early humans?

• It made them taller and more intimidating

• It helped them swim better

• It used less energy and freed their hands

• It allowed them to run faster

What activities were humans able to do with their hands due to bipedalism?

• Climb trees and gather fruits

• Hunt for food and make tools

• Swim and catch fish

• Fly and build nests