Posts tagged Stress relief
Don't forget to Breathe!

Everyone breathes. Breathing is the process of taking air into and expelling it from the lungs. Once blood has been oxygenated in the lungs it travels back to the heart and is then pumped around the body. The blood delivers its oxygen and collects the carbon dioxide, carrying it back to the lungs where it will be exhaled again. The air we breathe in contains approximately 21% oxygen and 0.04% carbon dioxide, whereas air that leaves the body contains approximately 15% oxygen and 4% carbon dioxide. Thus, the air we exhale contains 100 times more carbon dioxide and 6% less oxygen than the air we inhale. (Source: Anatomy & Physiology, Edition 5, Louise Tucker)

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