Download the respiratory system

THE
RESPIRATORY
SYSTEM
We breathe in order to take good
oxygen into our bodies and get rid off
dirty carbon dioxide.
HOW DOES THE RESPIRATORY
SYSTEM WORK?
The RS is made
up of organs in
your body that
help you
breathe. The RS
is made up of
the trachea, the
lungs, and the
diaphragm.
When you breathe in air you bring in
oxygen, it goes into your lungs and
then when you breathe out, you
blow carbon dioxide out.
The diaphragm is a muscle beneath
the lungs that helps move air in
and out of your body.
When you
breathe in the
diaphragm
contracts pulling
air into your nose
and your mouth
through the
trachea inflating
the lungs like a
balloon.
When you breathe
out, the
diaphragm relaxes
and moves up to
help push the air
out of your lungs
and out of your
nose and mouth.
The air you breathe passes into smaller
tubes that branch within the lungs.
These tiny tubes are called the
bronchus. There are 30,000 of them
in every lung.
There are tiny sacs called the alveoli
at the end of each bronchus.
There are about 300 million alveoli
in each lung.
Oxygen in the air you breathe passes
through the walls of the alveoli into
very small blood vessels called the
capillaries.
When the oxygen reach blood is
pumped by the body moves in the
exact opposite way passing from the
capillaries into the alveoli and leaving
the body when you breathe out.
The best way to keep your lungs
pink and healthy is not to smoke.
You can also show your love for
your lungs by exercising!
As you breathe more deeply and
take in more air your lungs
become stronger and better.
nose
pharynx
trachea
lung
bronchial
tube
alveoli
diaphragm
Write the names of the parts of the Respiratory System (page 149)
Write the names of the parts of the Respiratory System (page 149)