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Oxy the oxygen molecule's journey through the respiratory system

By Praniti Agarwal 7_7 Mr Haugen

Praniti Agarwal

on 20 January 2017

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Transcript of Oxy the oxygen molecule's journey through the respiratory system

Meet Oxy the oxygen
molecule from the air
in his journey through
the respiratory system.
First, air (including Oxy) enters the nose. The
nose contains hairs, because when we breathe in dust particles also enter our nose and the nose hair stops it from entering our body. Oxy feels warm in the nose, because the inside of our nose is warm.
Air enters our body when we breathe in,
when we breathe in, our lungs expand and the
atmospheric pressure quickly fills the space with air.
Oxy then slides down to the large trachea (wind
pipe) which is like a tube that leads down to the lungs.

The lungs are a large pair of organs that is located
in a human’s chest. Our lungs are protected by our rib cage. The lungs are a very important organ, because without this Oxy could have never entered our body to see the process of respiration!

These are Bronchi. Bronchi are large tubes that are located in our lungs. When Oxy enters our lungs he goes into our bronchi which then results in the bronchi to expand.
These are bronchioles. After Oxy goes into the bronchi, it gets divided and moves into smaller tubes called bronchioles .
Wow! There are
so many bronchioles,
in fact there are
roughly 30,000 in
each lung!

Air from the bronchioles then goes
to the alveoli. The alveoli are tiny air sacs.
Over there Oxy and his Oxygen friends
are separated from the rest of the air inside
and it then moves into the capillaries.
The alveoli is like an exchange point of
gases, from here Oxy goes into the blood
and Carby (Carbon Dioxide) comes in
from the blood to the lungs.
These are capillaries. The alveoli are covered in in capillaries.Capillaries are tiny blood vessels. It’s useful because useful Oxygen can pass through them to enter different cells to be used by the human body. There is also a protein called hemoglobin which is found inside our red blood cells that help in transporting oxygen to our body.
During the process of
cellular respiration, Oxy
gets mixed with Carbo
(Carbon) and from O2 it
becomes into CO2
(carbon dioxide). Oxy+
Carbo= Cardi (carbon
dioxide). Now Oxy looks
like this

Oh No! I hate being
Cardi! I have to escape
from here as soon as
So we breathe out (exhale)...
This is the diaphragm.It is a dome shaped muscle inside our body that helps us breathe. Also, it separates the lungs from the other organs. When it goes upwards, our lungs contract and we breathe out.
Now Oxy will come out
of the human body from
the same way it came in
and come out from the mouth
in the form of Cardi.
Meet Cardi the
carbon dioxide
molecule who was
once Oxy, an oxygen
almost out!
I'm in the
at the
Yay! I'm out
of the mouth
and into the
air again!
Background Music- The Respiratory System Song
Full transcript