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The human body is a complex system made up of many different parts that work together to keep it functioning properly. It is made up of bones, muscles, organs, and tissues, all of which are essential for its survival. Bones provide the framework for the body's structure and support its weight. They also protect internal organs such as the brain and spinal cord. Muscles allow the body to move by contracting and relaxing, while organs perform specific functions like digestion and circulation. Tissues connect and support other parts of the body, ensuring that everything works together smoothly. The human heart is a vital organ that pumps blood throughout the body, supplying it with oxygen and nutrients. It beats around 100,000 times per day, pumping over two billion times in a lifetime. The brain, on the other hand, controls all bodily functions, including movement, sensation, and cognitive processes like thinking and learning. Overall, the human body is an intricate machine that requires careful maintenance to function properly. A healthy diet, regular exercise, and adequate sleep are essential for keeping it running smoothly.