a: bone marrow ~
b: a blood-cell factory
What:
"The bone marrow is like a blood-cell factory. It contains stem cells that have the capacity to evolve into all three types of blood cells "
Useful?
Writer: Judith McKay, Tamera Schacher, Tammy Schacher
LCC:
Where:
Date: Feb 8 2015 8:04 PM
# 7277 Critique Analogy