why do air sacs and capillaries have very thin walls?

Subject: why do air sacs and capillaries have very thin walls?

Date: Wed Jan 13 20:22:27 1999
Posted by Alex Goddard
Grade level: 4-6
School: West Lane
City: Jackson State/Province: Missouri
Country: USA
Area of science: Anatomy
ID: 916280547.An

Message:


the reaspiratory system

Re: why do air sacs and capillaries have very thin walls?

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