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The human body is a highly complex and dynamic system that undergoes numerous changes throughout its lifespan. From birth to old age, humans experience a wide range of physical transformations that are shaped by a combination of genetic, environmental, and lifestyle factors. One of the most significant changes that occur in the human body is the process of growth and development during childhood and adolescence. During this period, the body undergoes rapid cell division and differentiation, resulting in the formation of new tissues and organs. This process is influenced by a variety of hormones, including growth hormone, thyroid-stimulating hormone, and sex hormones, which play crucial roles in regulating growth and development.