It goes through the lungs, back up your windpipe and out

with every exhale. It's a remarkable feat, this chemical

exchange and breathing in and out. You don't have to tell

your lungs to keep working. Your brain does it

automatically for you.

Factoids

Your lungs contain almost 1500 miles of airways and over

300 million alveoli.

Every minute you breathe in 13 pints of air.

Plants are our partners in breathing. We breathe in air,

use the oxygen in it, and release carbon dioxide. Plants

take in carbon dioxide and release oxygen. Thank goodness!

People tend to get more colds in the winter because we're

indoors more often and in close proximity to other people.

When people sneeze, cough and even breathe -- germs go

flying!