The heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is always at work. It pumps blood through arteries to deliver oxygen to organs and ...
Bored Panda on MSN
31 fascinating facts about the human body that not many of us are actually aware of
Some people believe we know everything about such thing as our body, since we study biology at school, read books, and watch ...
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