1						2
						3							4
				5				6
			7				8							9
													10		11
	12
			13									14
	15								16
							17
18														19
				20

Across 4. Articulation between cranial bones. 6. groove 7. One of two specific protuberances of bones in the ankle. 9. a cavity within a cranial bone. 10. A broad, shallow depressed area. 15. One of two specific tuberosities located on the femur. 17. A long, thin projection, often with a rough surface. 18. A small, smooth articular surface. 19. A prominent ridge. 20. An opening through a bone.

Down 1. A relatively large projection or prominent bump. 2. A projection that contacts an adjacent bone. 3. A long, tunnel-like foramen, usually a passage for notable nerves or blood vessels. 5. a short canal. 8. A projection near to a condyle but not part of the joint. 11. A relatively long, thin projection or bump. 12. The region where adjacent bones contact each other—a joint. 13. A large, rounded articular process. 14. A projection or bump with a roughened surface, generally smaller than a tuberosity. 16. A relatively small projection or bump.