Really, don't you think it would be more convienient to not have to breath at all? And, if your gonna say something like: "Because our heart's need oxygen in order for our bodies to work." Please say why we require oxygen to have our bodies work.
Here's a link that should explain.http://www.healthadviceonline.biz/elken-mrt/step-2-increased-oxygen-intake/body-metabolism-in-relation-to-oxygen-intake
We breath to get oxygen to different parts of our body. Without it we die.
we breath to feed or cells in our body so we dont die its like eating... you must feed those cells of yours
I would say this is sufficiently answered and we don't need a bunch of repeat answers.
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