Re: (the) and (of)
The format of your post makes it hard to read (as does the lack of punctuation). Please see my amendments above.
Originally Posted by abu asim
"The parts of head" is incorrect. It's not a full sentence but if you were to write a full sentence regarding the face, skull, nose, eyes, brain etc, you would say something like "I am going to write about the [different] parts of the head".
You might see "Parts of head" or "Parts of the head" as a picture caption or a very short chapter/paragraph title in a book about biology, but it's not a full sentence and would mean nothing in a normal context.
Remember - correct capitalisation, punctuation and spacing make posts much easier to read.