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The Endomembrane System

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The endomembrane system is a group of organelles — nuclear envelope, ER, Golgi, lysosomes, vesicles, plasma membrane — modifying, packaging, and transporting lipids and proteins.

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A protein made in the ER can travel by vesicle to the Golgi, then to the plasma membrane, without leaving this network.

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Mitochondria and chloroplasts sit outside this system.