Mystery #1Tier 2body / skin
Why is your skin called your biggest organ?
When you think of organs you picture the heart, lungs or brain, tucked away inside. But the body's biggest organ is on the outside, wrapped around all of you: your skin. Why does a covering count as an organ at all?
Your guess
What's your hunch about why your skin counts as an organ, and an important one?
There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.
Make a guess to unlock the hints and the answer.