Can someone tell me where I can find a simple diagram of a microprocessor on the web,and can you please tell me what these parts are

Bus,regesters,accumulators,RAM.ROM,program counter,and what are there functions?

Go to the search engine www.google.com enter each one of those words and you should get a nice response.
Google is a good site for general and tech searches.

Enjoy

Juan, try www.howstuffworks.com and then type in "microprocessor" in the search area. Then scroll down to the middle where it says "How microprocessor works" It will give you a lot more than we have room to explain here. Excellent. I highly recommend it . And yes, it has diagrams ;)