Physiotherapy Question:

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!