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Author Topic:   How did the stomach evolve?
Stile
Member
Posts: 4295
From: Ontario, Canada
Joined: 12-02-2004


(2)
Message 4 of 18 (721978)
03-14-2014 10:49 AM
Reply to: Message 1 by CoolBeans
03-13-2014 10:28 PM


Basic Evolution of the Stomach
CoolBeans writes:
Don't gastric acids dissolve the food but without the protection it would burn the stomach and for them to exist we would need something to be protected from.
Yes, this is correct.
How did the stomach evolve?
The stomach evolved a long time before humans were around. By the time humans came around, the stomach had already evolved to the point where it had gastric acids and mucous protection.
The mucous would be present first... although not like the mucous we have. A much more basic version.
The mucous would work with a simple in/out system just helping things move around (before there's even a "stomach!").
Eventually, a "digesting pouch" evolves that we can sort of call a stomach.
Once this basic stomach exists, small amounts of gastric acids would help with digestion.
At this point, the acids and protection would evolve together.
As one gets a bit stronger... so does the other. Not necessarily either one over the other at any specific time.
And then... one day... a stomach!
And then... after a lot more days... humans with a stomach!

This message is a reply to:
 Message 1 by CoolBeans, posted 03-13-2014 10:28 PM CoolBeans has not replied

Replies to this message:
 Message 10 by Cedre, posted 04-10-2014 7:25 PM Stile has replied
 Message 17 by Omnivorous, posted 08-28-2014 3:54 AM Stile has replied

  
Stile
Member
Posts: 4295
From: Ontario, Canada
Joined: 12-02-2004


Message 13 of 18 (723955)
04-11-2014 8:21 AM
Reply to: Message 10 by Cedre
04-10-2014 7:25 PM


Thanks! But please try again.
Your comment seems a little lacking in substance. Perhaps you could try again with a bit more information on your particular issues.

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 Message 10 by Cedre, posted 04-10-2014 7:25 PM Cedre has not replied

  
Stile
Member
Posts: 4295
From: Ontario, Canada
Joined: 12-02-2004


Message 18 of 18 (735938)
08-28-2014 9:15 AM
Reply to: Message 17 by Omnivorous
08-28-2014 3:54 AM


Re: Basic Evolution of the Stomach
That's only after we lose a finger...
Contrary to popular research, it's not the pinky finger we end up losing.
It's the ring-finger.
Something about teh gays destroying teh marriage
Edited by Stile, : Being silly

This message is a reply to:
 Message 17 by Omnivorous, posted 08-28-2014 3:54 AM Omnivorous has seen this message but not replied

  
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