Human body is the most complex machine ever created! With a complex network of interconnected organs, millions of cells and the most advanced processor, human body is the most automated system in this planet. In this article, we will draw comparisons between working of a human body to that of a data center. We will draw parallels between human body automation to data center automation and explain different levels of automation we need to drive in data centers. This article is divided into 4 parts covering each of body main functions and drawing parallels on automation. This is 3rd article in the human body series, please go to http://ashishnanjiani.ulitzer.com or http://ashishnanjiani.com