The most important reason to washing a cutting board is because it can grow bacteria, if it's not washed with bacteria cleaning soap and hot water.
Well if you're referring to the human body, our cells make up a lot of everything we're made of. Muscles, organs, bones, blood, skin, etc. Biologically speaking, there's a lot to the human body besides organs. Sorry if this isn't very helpful.
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Beta-adrenergic blockers will reduce the heart's demand for oxygen
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