Assumes You Know Tree Physiology
a: Lung ~
b: an upside-down tree
What: "A lung is like an upside-down tree. The trachea (TRAY-kee-uh), or windpipe, is like the tree trunk. Bronchi (BRONG-kie) are like branches. Air sacs called alveoli (al-VEE-oh-lie) are like leaves. Oxygen goes out and carbon dioxide comes in while the gases are in the alveoli."
Useful?
Writer: Not Stated
LCC:
Where: Reference Link Has Evaporated
Date: Mar 7 2014 4:10 PM
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