8 Of Your Embarrassing Body Questions, Answered With Science
We asked for the science questions you didn't want your name attached to, and now we’re answering them. This time: eye gunk, blackheads, and are ovaries really rolled up testicles?!
1. "What actually are blackhead pimples?"
2. "Can you sneeze with your eyes open?"
3. "My boyfriend keeps telling me girls had testicles at birth but they rolled up inside them and turned into ovaries... true or not true?"
4. "What's the purpose of wisdom teeth?"
5. "Do you have blue blood in your body?"
All those diagrams that showed arteries as red and veins as blue lied to you. Deoxygenated blood is a darker red than oxygenated blood, but calling it blue would be a bit of a stretch (there's an interesting discussion to be had about how the perception of colour plays into this, but we'll save that for another time). Think about it: If there were blue blood in your veins, it'd come out that way when you cut yourself, right?
Veins look blue, however, when you view them through your skin because of the different wavelengths different colours of light have (blue is shorter than red) and how far into your skin the blood vessels you're looking at are.