a: placenta ~
b: screen on a window
What:
"In this way, the placenta is like the screen on a window of your house. Rain and pollen from outside can get in through the holes of your screen. But bugs are too big to fit through and get inside. And the smell of your cooking can waft outside through the holes in the screen - but you can't."
Useful?
Writer: Julie Granka
LCC:
Where:
Date: Feb 25 2017 8:38 PM
# 10985 Critique Analogy