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The human body is a complex and intricate machine that is capable of incredible feats. It has the ability to heal itself from even the most severe injuries, and it is home to trillions of tiny organisms called microbes that play a vital role in our overall health. The skin is the largest organ in the body, accounting for over 15% of our total body weight, and it serves as a protective barrier against the outside world. It also helps to regulate our body temperature and aids in the production of vitamin D. The human brain is perhaps the most fascinating part of the body, with billions of neurons working together to control every aspect of our lives, from movement and sensation to thought and emotion. It is estimated that the brain uses up a significant portion of the body's energy, accounting for around 20% of our total daily caloric intake.