Actually, a cyborg is defined as being biological combined with synthetic. Because our bodies adapt to the things, in a sense we ourselves grow synthetic attributes. Take meat for example. Because of the steroids and everything used to made them bigger and healthy, our bodies integrate those same things into our systems and we undergo the same changes. And then you have the vaccines. With the way that they are made now, what was once a deadly disease is now nothing to us. Take the common cold for example. In the past, it was common for people to die from this. Now, thanks to the synthetic particles in our systems, it is typically nothing more than a minor inconvenience.