wownder.windforwings.com
wownderMonday, July 30, 2012. The Heart Still Goes On. While Muscles Tire. You are off on a long walk. a hike in the woods. it seems like you have been walking for hours. your legs are aching and dragging. but surprisingly, your heart is racing on and beating faster than ever. Hmm. Strange, isn't it? When other muscles of your body tire out regularly and complain on overuse, why doesn't the heart ever do so? Mitochondria in our cells. ATP can be produced in two ways:. The food that we eat is converted into a si...
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