Subject: What happens to animal cells when they are heated to a high temperature?

While preparing dinner for my family last night, I began to wonder, "Why 
does the texture of beef (or other kind of meat) change when it is 
cooked?" I know some of the water cooks out of the meat, but does the 
meat's cell structure change as well? I would suppose that cell damage 
occurs, but what is the extent of this damage?
Thank you so much for your attention!
-Marie H.

Re: What happens to animal cells when they are heated to a high temperature?