Why do things feel the way they feel?

[sbleav]

Why does the surface of a tree feel harder than the surface of a dog? What cell characteristic can be used to explain this difference?

[MichaelXY]

Kind of like a scar on the skin.

[sbleav]

i guess...im not really sure. i just need to know what the difference in the cells are.

[MichaelXY]

And I would like someone to take my next chem exam for me.

[sbleav]

haha...im pretty good at chem. but its been awhile.

[MichaelXY]

Maybe this will help.
http://www.caf.wvu.edu/bark/treelinks.htm

[sbleav]

wow, thanks! i think ive figured it out, haha