Question

what does carbon dioxide have to do with the circulatory system?

Answer 1

When we breathe in polluted air(which is more of carbon dioxide) the oxygen supply to the cells is cut off(or almost cut off). So we will have breathing difficulty as we will have to breathe more often to get more oxygen into the body.

Answer 2

It will also lead to tiredness.

Answer 3

Pratu has accurately explained what happens when our bodies do not get enough oxygen.

Now, your heart is the center of your circulatory system. Take a look at the picture of the heart.

The heart pumps blood WITH oxygen
through the left atrium,
through the left ventricle,
and then through the aorta,
so that all of your body's other organs can get oxygen.

But AFTER your body uses all the oxygen from that blood, the blood WITHOUT oxygen comes back to the heart,
through the right atrium,
through the right ventricle,
through the pulmonary artery,
and BACK to the lungs.

Your lungs will GIVE oxygen to the blood, and TAKE AWAY the carbon dioxide. That is why we breath IN oxygen, and we breathe OUT carbon dioxide.

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So, once again, to briefly answer your question....your circulatory system brings carbon dioxide back to your lungs, so that you can get rid of it, by breathing it out.

Answer 4

See Guyton Physiology Chapter 40 page 510