It's a bare bones fill in the blank sheet of the skeletal system with boxes pointing to different bones. You can number which ones you want students to answer or even "x" out options they don't need to worry about. For example, I've printed this out and whited-out some boxes and parts that my 7th graders don't need to worry knowing about yet.
The key for this quiz is included. I put N/A next to bones that I don't expect my students to answer, but this quiz is editable in Word, so you can always adapt it to your needs.