Tap to enable a layout that focuses on the article.
Advertisement

POP QUIZ:

How much blood does the heart pump through the body

every day?

See answer, S3

*

POP QUIZ ANSWER:

The heart, about the size of a fist, pumps about 2,000 gallons of blood through the body daily.

(Question on S1.)

Sign up for Climate | Health | Science

A weekly round-up of the latest in science, health and the environment.

Advertisement
Advertisement