The smallest biological unit capable of supporting life on its own and constituting both all living entities and bodily tissues. Cells serve as the fundamental structural and functional unit of all living organisms. The three essential parts of a cell are the cell membrane, nucleus, and cytoplasm. The cell membrane, which encloses the cell, controls the substances that enter and exit the cell. The nucleus, a part of the cell that contains the nucleolus, is where the bulk of the cell's DNA is found. Additionally, the majority of RNA is produced there. Cytoplasm is the term for the substance that makes up a cell. There are many more little cell parts, each with a specific function, such as the Golgi complex, mitochondria, and endoplasmic reticulum. The cytoplasm is where most chemical reactions as well as protein synthesis take place. Human bodies are made up of more than 30 trillion cells.
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