ziczac, on 06 September 2012 - 01:08 PM, said:
just wanted to answer the question about the usefullness of the apendix and the goose bumps:
- to the first question:
http://www.scienceda...71008102334.htm
- to the chill question:
when you're cold, the body tries to make a thicker layer of trapped air around your body to hold your body heat
Everything happens for a reason! please ask more challenging questions because these are realllly EZ!
From your first link:
Several decades ago, scientists suggested that people in industrialized societies might have such a high rate of appendicitis because of the so-called "hygiene hypothesis," Parker said. This hypothesis posits that people in "hygienic" societies have higher rates of allergy and perhaps autoimmune disease because they -- and hence their immune systems -- have not been as challenged during everyday life by the host of parasites or other disease-causing organisms commonly found in the environment. So when these immune systems are challenged, they can over-react.
"This over-reactive immune system may lead to the inflammation associated with appendicitis and could lead to the obstruction of the intestines that causes acute appendicitis," Parker said. "Thus, our modern health care and sanitation practices may account not only for the lack of a need for an appendix in our society, but also for much of the problems caused by the appendix in our society."
Now look at this map, and see where appendicitis is least frequent:
http://en.wikipedia....Y_-_WHO2004.svg
Don't know, but to me it seems to contradict what Parker said.
And about the goose-bumps:
As we all know from experience, goose bumps have hardly if any effect at all in keeping us warm.
It's nothing but an atavistic (don't know if this is the right word here) respons to cold: when we still had fur, our hair would stand up, and thus keep warmth trapped inside the fur, and isolate us from the cold.
.
Edited by Abramelin, 07 September 2012 - 02:55 PM.