Question for pig dissection

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seasira
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Question for pig dissection

Post by seasira » Thu Jun 01, 2006 12:22 am

Hi I am doing the pig dissection in school, and I need help on a question and I was hoping you guys could help.

In terrestrial vertebrates, what is the advantage of having the surfaces for oxygen and carbon dioxide exchange embedded in deep lung tissue?

Its not in my packet anywhere Thank you so much. If I find the answer before there are any posts I will let you know.

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mith
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Post by mith » Thu Jun 01, 2006 3:33 pm

sea=wet
land=not so much
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr

seasira
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Post by seasira » Fri Jun 02, 2006 12:25 am

okay thank you so much!!

docbandoodles
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about the deep location of the gaseous exchange

Post by docbandoodles » Fri Jun 02, 2006 9:55 am

these serves as protection from the various pathogens,before the inhaled air can enter the body, the immune mechanism like the respiratory cilia, mucus can hinder the entry of bacteria and viruses.

dr.bandoy

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MrMistery
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Post by MrMistery » Fri Jun 02, 2006 5:37 pm

you are right, docbandoodles, especially in humans. But in amphibians for example, most of these adaptations do not occur. As Dave said, the main problem is water loss...
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

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