Puerta Metal

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Human beings are complex organisms made up of a multitude of cells that work together to form tissues and organs. The human body is divided into three main systems: the nervous system, which controls movement and sensation; the circulatory system, which transports oxygen and nutrients throughout the body; and the digestive system, which breaks down food for energy. Humans also possess a unique ability called language, which allows them to communicate with one another through verbal and written means.