The structure of a human cell includes the following parts:
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Cell membraneA fragile membrane that surrounds the cell and controls what passes in and out
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NucleusContains the cell’s DNA and nucleolus, which produces ribosomes
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CytoplasmA fluid that contains organelles and where most chemical reactions and protein production take place
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OrganellesSpecialized parts of the cell that perform specific functions, such as mitochondria, ribosomes, Golgi bodies, and lysosomes
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Cell inclusionsSmall non-living structures within the cytoplasm, such as melanin, glycogen, and enzymes
The average human body cell is between 20–30 micrometers in size.
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