WORD SPIRAL

Starting from 1, fill in the grid clockwise with four-letter words. The last letter of each word becomes the first letter of the next and the shaded squares will reveal a surgical item.

1. Ice hockey disc 2. Pavement edge

3. Formal social dance

4. Heavy metal

5. Arab sailing vessel

6. Stinging insect 7. Chums 8. Identical

9. Flat 10. One more than eight 11. Direction 12. Mexican snack 13. Formerly 14. Flightless birds 15. Potato 16. Twofold