Consider the miracle of the human body. Identify 3 major components of its masterful design.
"When you come right down to it, the most incredible creation in the universe is you - with your fantastic senses and strengths, your ingenious defense systems, and mental capabilities so great you can never use them to the fullest. Your body is a structural masterpiece more amazing than science fiction." (Guiness, ABC's of the Human Body, p. 5)