During the embroytic stage we most resemble sharks. Shuben explains to us that the characteristics of people are formed form the characteristics of sharks therefore we are an adaptation. In this chapter in all the human head is compared to the head of a shark which in all actuality is a fish. The human embryo is very similar to the embryo of a shark. Humans share the same structure of the body with sharks. Our heads in nerves inside our brains are the most complex and confounding part of our body and what goes on inside of it is interesting as well.