defogger

Hi.... 2011 CRV EX-L Can someone please tell me if any of the rear screen is an aerial ...as in the lines. Some cars have defogger lines and also aerial on back screen, Im trying to work out if any lines are damaged as some if it doesnt heat up. Also is the best cure to change the screen...

I've been trying to figure out why my driver side defogger isn't heating up, and I've found out that it's none of the wiring that actually leads up to the mirror, therefore it either has to be the defogger itself, or the wires that are in the mirror. But I have no idea where to go from here...