BTW, are you actually looking to have your head machined professionally, or are you just curious? It sounds like you heard someone talking about heads and you just want info...

To help clarify what the head is, if you look at your motor, notice where the exhause manifold bolts up to the motor (exhaust manifold is commonly refered to as a header). If you are standing infront of the car, where you see "DOHC VTEC" on the valve cover, the exhaust manifold is between you and the motor. Look just below where that is bolted on and you will notice where the two main halves of the engine are brought together. The head is the rectangular shaped (basically rectangular) part that is above that line, and the block is everything below.

Also connected to the head is the intake manifold. Its the big grey thing between the motor and the firewall. You can see your fuel injectors and everything else hooked up to it.

If all this is too basic, forgive me, you said your a noob...