#3109528 - safe, artist:pony-berserker edits, derpibooru import, edit, free love (changedling), ocellus, changedling, changeling, comic, meme, speech bubble

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SilentObserver01

It’s all in the metals in the hemoglobin. Ours is red because of iron, which rusts red, so oxygen turns it red. If you had something other than iron it would change the color.

Posted 1 years ago Report

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