Re: Yet another ID lie - Humans do evolve.

On Sun, 20 Nov 2005 17:29:48 GMT, NashtOn <nana@xxxxx> wrote:

>Grandbank wrote:
>> NashtOn wrote:
>>
>>>Teeth, like many other tissues, respond to external stimuli. Given that
>>>teeth are essentially bone, with Haversian canals, Volkmans canals,
>>>osteoblasts and osteoclasts, it is safe to say that remodeling of tooth
>>>bone is possible and according to a specific diet.
>>>
>>>This is basic physiology.
>>
>> (snip)
>>
>> No, actually that is a basic uninformed lie.
>> Teeth are not at all like bone in either their anatomy or histology.
>> Teeth possess none of the 4 tissues you list above.
>
>I guess there is no hydroxyapatite in teeth, huh?
>
>> While I admire your chutzpah, tossing a Hail Mary like that and hoping
>> there wouldn't be a dentist (or anyone with some knowledge of the
>> subject) in the crowd to intercept it, well, you lose.
>
>Are you saying that teeth don't respond to external stimuli?
>
>> That "This is basic physiology" bluff line did have a nice ring to it
>> though, didn't it. Very authoritative. Very wrong. Do you play
>> poker?
>
>Actually, it would be very nice of you to give us a lesson on tooth
>physiology, from embryology to the mature tooth. Actually, a few
>references will do.
>
>> Your ignorance of dental anatomy and histology would appear to match
>> your ignorance of darn near everything you post about.
>
>Yawn. You and your ilk would say anything to discredit your opponents.
>These antic don't cut it here, you merely succeed in making yourself
>look like a blithering fool, fool.
>

For a lesson on tooth evolution, see
http://www.palaeos.com/Vertebrates/Bones/Teeth/Teeth.html
Are bones derived from odontodes? Teeth and scales, plus their
derivatives, are.

Tooth structure is very different from bone structure. Yes there are
canals in dentine, but they are different from those in bone. Yes,
teeth and bone both contain hydroxyapatite. Both also contain
protein. Do you want to base a similarity on that point? Yes, there
are "blast" cell which are involved in tooth formation, but
odontoblasts and ameloblasts are not the same as osteoblasts and
osteoclasts. Yes, there are adaptation and restructuring processes in
both tooth and in bone so they can respond to external forces, but the
processes are quite different.

We and our ilk would say anything to discredit our opponents provided
the things we say are facts buttressed by large amounts of scientific
analysis. These antics most definitely do cut it here, except for
those whose knowledge is based other than on careful observation,
experimentation, and rational thought. The ones the end up looking
like blithering fools are quite the opposite of what you suggest.



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