"I was always shocked when I went to the doctor's office and they did my X-ray and didn't find that I had eight more ribs than I should have or that my blood was the color green."

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The inspired and expired air may be sometimes very useful, by condensing and cooling the blood that passeth through the lungs; I hold that the depuration of the blood in that passage, is not only one of the ordinary, but one of the principal uses of respiration.

— Robert Boyle