Type E

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The human body contains approximately 60 trillion cells and is composed of more than 50 different types of tissues. These tissues are made up of even smaller units called organs, which work together to form a complex system that maintains life. The major systems include the skeletal, muscular, circulatory, nervous, endocrine, respiratory, digestive, urinary, and reproductive systems. Each system has its own unique structure and function, but they all play an essential role in keeping the body alive.