Human Body
Exploring "Why" questions about Human Body
481 articles
Why does eating uncooked dough make your stomach sick?
Most doughs have eggs in the ingredients. You can get sick from uncooked eggs / bacteria. regardless of eggs, bacteria tends to only go dormant when it's cold.
Why can’t you put modern parts into the body of an antique car? I know it’s very different, but why isn’t it somehow possible to create a vehicle with custom parts in the same way you would create …
You can. Look at the hot rod world. Hot rods have a long history, especially in the USA but essentially its about taking an old car and equipping it with a modern drivetrain, suspension, brakes and so
Why are livers prone to failure, when they can regrow themselves?
Livers aren't prone to fail over time due to alcohol, that is the wrong way to look at it. Livers valiantly extend the lives of people dead set on drinking themselves to death, holding out for as long
Why were there so many big supporters of eugenics in the early 1900s (e.g., Tesla, Churchill), and what changed from then to now to shift views on the subject?
The main reason eugenics fell out of favor is that the people carrying it out were worse than the people they claimed were sub-human. The things the Nazis did ended up convincing just about everybody
Why is a recent (less than a year) prescription required to order replacement contact lenses or glasses when it’s OK to wear existing lenses or glasses for over a year?
I get my eyes checked every year and because of my health insurance, I only pay a small copay for new glasses/contacts. You should be wearing the best corrective lenses for your eyes so if you have no
Why do we have to eat and urinate throughout the day, but can make it through 8+ hours of sleep just fine?
During sleep, your metabolism slows. Your digestive and renal systems shift into a slow mode so they produce less waste.
Why does my mouth feel cleaner the morning after eating something garlic heavy the night before?
I think it's a coincidence. I'm a dentist. If you brushed properly before you slept you probably shouldn't have had much plaque in your mouth overnight which would 'grow'.
Why does our stomach and or intestines dont eat itself?
Our intestines have muscosals on the inside. That's a kind of slime between the stomach and the acid. *Side-fact: When you die, the muscosals can't be regenerated, and then you "eat" yourself.
Why do pregnant women with Ebola have a 95% chance of dying, (rather than the 40% chance of dying)?
During pregnancy, the immune system is suppressed to prevent the woman from rejecting the fetus. This makes fighting virulent infections a bit difficult. This is also why many women with autoimmune co
Why does human hair grow for so long that it has to be cut while the hair on chimpanzees or cats for instance just stop at a certain point?
I think that's because they have fur/body hair rather than hair. Poodles, for example, have hair and they need regular haircuts, i believe. I don't really know why the body hair/fur doesn't grow, prob