how does a living cell perform basic functions

The cell (from Latin cella, meaning "small room"[1]) is the basic structural, functional, and biological unit of all known living organisms. Cells are the smallest unit of life that can replicate independently, and are often called the "building blocks of life". The study of cells is called cell biology.
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There is a division of labour in multicellular organisms such as human beings. This means that different parts of the body performs different functions. For eg. the human body has heart to pump the blood a stomach to digest and so on. Similarly the division of labour is also seen with a single cell. Each such cell has got certain specific components within it known as cell organelles. These organelles perform specific function for the cell.
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A living cell goes through many processes that keep it alive. In order to perform basic functions it goes through processes such as converting fuel into usable energy. Cells also divide in order to keep living and keep the creature they are making up alive. Without cell division we would not be able to live.
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