Cells are the basic structural and functional units of all living organisms, serving as the building blocks of life. They carry out essential processes such as metabolism, growth, and reproduction, which are vital for the survival of the organism. The organization of cells into tissues, organs, and systems enables complex functions and interactions that characterize living things. Ultimately, all living organisms, from single-celled bacteria to multicellular humans, are composed of one or more cells, highlighting the fundamental role of cells in Biology.
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