Human Body

3. — Organ that renews itself roughly every month
4. — Molecule that, if stretched out, would measure about 2 meters per cell
7. — Bone stronger than concrete by weight
9. — Organ capable of regenerating itself after damage
11. — Organ that produces acid strong enough to dissolve metal (but protects itself)
12. — Body part capable of remembering thousands of smells
14. — Muscle that can keep beating outside the body briefly under the right conditions
16. — Organs whose surface area is roughly the size of a tennis court
17. — Bone that doesn’t fully develop until childhood

1. — Liquid that helps you taste food (without it, flavors are harder to detect)
2. — The only bone in the body that does not connect to another bone
3. — The smallest bone in the human body, located in the ear
5. — Organ that uses about 20% of the body’s total energy
6. — Hair that helps keep dust out of your eyes
8. — Body tissue with no blood vessels
10. — Body structures that you are born with about 270 of, but adults have only 206
11. — Structure that actually shrinks slightly during the day from gravity
13. — Organ that can distinguish millions of colors
15. — Muscle that never gets tired the way most others do