Yeung Eloise

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The human body is a complex machine that is made up of trillions of tiny cells that work together to keep it running smoothly. The brain is the main control center of the body and it sends out signals to all the other parts of the body through a system of nerves. These signals tell the muscles what to do, how fast to move, and when to stop. The heart pumps blood throughout the body, providing oxygen and nutrients to the cells, while the lungs breathe in air and expel carbon dioxide. The digestive system breaks down food into tiny particles that can be absorbed by the body, giving it energy to function properly.