Are we just machines?

As I stated in class, I do believe that we are one large machine made up of a combination of little machines. Every single part of our body is made up of a molecular machine and I challenge you to name one part of the body which is not. The topics of emotion and free will were brought up in class, yet emotions are felt because of biological processes, because of reactions that occur within the brain. If those machines didn't work the way they do, we would fail to show any emotion or mental response. The free will topic is a little harder to discuss because the term is so broad, but again I would argue that these cognitive decisions and the ability to choose among them is made possible by the molecular machines in our brains. Without the nerve ending in our brains which send signals to each other and provoke certain emotions we wouldn't have the ability to make decisions. Finally, I also mentioned in class that humans have the sole biological purpose of reproducing. I'm not arguing that humans are forced too or don't have other goals, such as obtaining a job or marrying, but we are biologically rigged to reproduce and pass on our genes to the next generation.