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Author Topic:   Recurrent Laryngeal Nerve: Part II
Member (Idle past 4894 days)
Posts: 400
From: Colorado, USA
Joined: 02-16-2009

Message 45 of 75 (572923)
08-08-2010 5:09 PM
Reply to: Message 38 by ICdesign
08-08-2010 11:53 AM

Re: The route of the RLN is obvious... but only when you consider evolution
ICDESIGN writes:
First of all, a drawing of the nerve in the fish next to a drawing of the nerve in a human does nothing but prove both have the nerve.
That's not all it proves. It shows that not only do all vertebrates share the nerve, they all have it wired in the same way. It also shows how the route the RLN takes makes the most sense (it is the most direct) in fish. In animals with longer necks it makes less and less sense.
So one can then infer that the RLN appeared first in animals without necks, and then as necks evolved and lengthened, the RLN stayed wired the same way while it was forced to take a longer, more circuitous route.
Of course, alternatively, one could suggest that the Intelligent Designer was lazy. And that he worked out the routing of the RLN for the fish, but then decided to copy-paste this design onto all other vertebrates so that he could get home before rush hour.
ICDESIGN writes:
or how it ended up with a major purpose when even you Darwinists yourselves admit evolution has no purpose.
Who said evolution has no purpose? It has a well-defined function: The increase of fitness within a population. Could that not be a purpose?
If the vagus nerve supported that function, why should it not evolve?

This message is a reply to:
 Message 38 by ICdesign, posted 08-08-2010 11:53 AM ICdesign has not replied

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