a: alveoli ~
b: loading docks
What:
"The alveoli are like the loading docks where trucks pick up their load. Capillaries are so small, in some places, that only *one* RBC at a time can get through!"
Useful?
Writer: Delos Johnson
LCC:
Where:
Date: Mar 12 2015 7:21 PM
# 7520 Critique Analogy