a: thymus ~
b: library
What:
"The immune system has a central intelligence called the "thymus" which is a small organ located above your heart under the upper ribs. The thymus is like a library and catalogues all the past invaders, so the immune system can quickly fend off past invaders."
Useful?
Writer: Not Stated
LCC:
Where:
Date: Mar 2 2014 1:15 PM
# 5168 Critique Analogy