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By Rachel McKenna, 8 White
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Brief information about
Carbon Dioxide
Carbon dioxide (Co2) is a colourless gas composed of one carbon atom and 2 oxygen atoms. It is about 1.5 times as dense as air.
Carbon dioxide is present in our body from 3 main sources:
– The food we eat
– The air we breathe in
– Chemical reactions in our body (Example, if we run a lot, our muscles release a little bit of carbon dioxide)
The amount of carbon dioxide in your blood influences your breathing rate. Our blood needs a well balanced level of oxygen and carbon dioxide. If this balance is put out, your breathing rate is affected (If the level of carbon dioxide in your blood increases, your breathing rate will increase so that oxygen will be inhaled and carbon dioxide can be exhaled from your lungs and passed out of your body).
Brief information about
Carbon Dioxide
Bloodstream (with carbon dioxide)
OesophagusLungs
Heart
Mouth
Vein
Carbon dioxide enters our body via various means. The blood (including carbon dioxide) travels through our veins to the right side of the heart.
Step 1
Vein
Erythrocytes(Red Blood Cell)
Leukocytes(White Blood Cell)
C
C
Carbon Dioxide (CO²)
C
Step 2
Entering through the left side, the heart pumps the blood to the lungs where it is oxygenated.
Erythrocytes(Red Blood Cell)
Leukocytes(White Blood Cell)
Carbon Dioxide (Co2)
Lungs
Heart
Step 3
The Lungs now separate the Carbon dioxide from the bloodstream. The Carbon dioxide is now in a gaseous state.
Erythrocytes(Red Blood Cell)
Leukocytes(White Blood Cell)
Carbon Dioxide (Co2)
Lungs
Heart
Step 4
The Carbon dioxide goes from the lungs, up through the Oesophagus.
Oesophagus
Lungs
Heart
Step 5
And lastly the carbon dioxide is breathed out the mouth! (This happens when we exhale)
Oesophagus
Mouth
And that is the path of Carbon dioxide in the bloodstream to the mouth!
Thank you for watching!
Bibliography
• http://en.wikipedia.org/wiki/Carbon_dioxide
• http://encyclopedia.kids.net.au/page/ca/Carbon_dioxide
• http://www.windows2universe.org/earth/Water/co2_cycle.html
• http://www.realtrees4kids.org/sixeight/cycles.htm
• Science Quest 2, Third Edition, G. Lofts, M. Evergreen 2006
• http://www.google.com.au/imgres?q=human+heart+outline
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