Strange question

I was listening to the radio the other day on my way to go out to lunch. Well they asked a question, and i have been trying to figure it out since then. You see, by the time I got back in my car they were onto something else. Here’s the question:

What are the ten body parts on a human that are only three letters? (@$$ does not count)

1) leg
2) arm
3) hip
4) toe
5) ear
6) eye
7) lip

Can anyone finish the list???