It takes about 20 seconds for a red blood cell to circle the whole body.
It takes about 20 seconds for a red blood cell to circle the whole body. is a Health Fact in the Health Facts category.
Like this on Facebook!
Fact Tags
Tags: Human Body, Human, Red Blood Cells
Fact Comments
591 days ago
raiza
i know!
493 days ago
Milagros
Cool 
261 days ago
Anonymous
n n ,m n,