How come can we see? So why can we hear? For what reason can we speak? How come can certainly we stand, walk, jump, and sit? Quite simply, how do we live in this world? As a result of science and technology, we know today. We can see simply because we possess a two of eyes. People can hear as we have a couple of ears. We can easily speak out mainly because we have actually a mouth and vocal chords. We all can easily stand and perform locomotive functions mainly because we own our body. We are capable live in this globe since we have a full human framework. Even though we may not see it, nonetheless the structure of the human body provides us life, aside from the external components, just like air, food, water, and others, that all of us want to have each day. Without a total body structure, we are not able to live routinely in this world.