FIRST Double Jeopardy! (9/29)
 

For 400, human skin is the least sensitve here.

Where is the middle of the back?

Where is the soles of the feet?

What is the heel?

What is the buttocks? :p

On scars.

It's kinda skin...

-Andy A.

Where is the floor?

Humans shed dead skin cells constantly too.

David is correct.

whoa whoa... i dont wanna get picky but my answer is virtually the same as david's.. for example- what i found on google for "soles of feet"- (titled "Pair of feet soles")



and now the heel- (titled "heel")



hmm...

The skin itself is equally sensitive everywhere.

There are less never endings in some places then others, but the skin is equally sensitive.

Wetzel

I'm no dermatologist, but I don't believe that's correct. No matter what the nerve ending density is, skin can be callous or not. I would pose that there're parts of skin which are less sensitive than, say, the heel, which is typically very callous.

A callus is dead skin.

Then the answer to the least sensitive skin is dead skin.

Wetzel

(I really hate not being able to edit posts.)

I guess it depends on your definition of "sensitive". I believe that the first two definitions, listed on dictionary.com for the word, cover the two different things we are thinking about:
Less nerve endings would result in less capability to percieve sensation, while calloused skin would be less responsive to external stimuli.