A funducational song for a health project about the respiratory system, written by Jerome Linn with the help of his little brother Kevin (Not really, but Kevin had to get credit for the project otherwise he would have wound up failing). Enjoy!

Lyrics:
I'm here to tell you all about a wonderful system that's important in so many ways.
Something that is known as the respiratory system so listen to what I have to say.
Our bodies need lots of oxygen to function but they leave behind a CO2 waste.
That is why we need the respiratory system and it's why this system is so great.

(Chorus)
So we breathe, we breathe.
Humans trade off carbon dioxide for the oxygen made by trees.
We breathe, we breathe.
We give oxygen to blood and blood to organs so they'll function with ease.

The mouth and the nose are the first step in the process -- a step that is an absolute must.
This is where we breathe in the air to take in there while nasal hair traps all the pollen and dust.
If any of the dust gets by, no need to cry because mucous still lines the route.
The cilia then pushes back this helpful trap so we can swallow it or spit it out.

Next stop, the pharynx -- the name for the tube that's used for food and liquid and air.
Elastic cartilage called the epiglottis protects a tiny little hole down there.
The air can still get through and the next thing it will do is blow right past a pair of vocal cords.
They're found in the larynx -- the voicebox by your pharynx. Speech is what these chords are for.

(Chorus)

The air keeps moving further further down into a tube called the trachea.
It's made of rings of cartilage lined with pseudostratisfied ciliated epithilium.
It may sound absurd and the words are quite a mouthful. They're a little bit tricky to say.
As hard as they seem what they really mean is that the trachea's a clear passageway.

At the end of all this, the trachea splits into the branches where the airway flows.
The bronchi start off big, but they branch off into twigs that are much smaller called the bronchioles.
At the end of these tracks close to 30 million sacs trade oxygen for CO2.
Alveoli is the name for these guys and it's amazing what they all can do.

(Chorus)

The air goes to the lungs which are hung among some other body parts that help the system work.
A cage of ribs serves as a hard protective crib in which these lungs will likely not get hurt.
Finally, to help you breathe, a tube-like muscle works between your chest abdomen.
The diaphragm contractss to take in air and then expands to push it out again.

(Chorus)
So we breathe, we breathe.
Humans trade off carbon dioxide for the oxygen made by trees.
We breathe, we breathe.
We give oxygen to blood and blood to organs so they'll function with ease. (x3)

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