Dictionary of Human Evolution and Biology

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Endoplasmic Reticulum

An organelle consisting of a hollow system of cytoplasmic canals, tubes, vesicles, ventricles and caverns, which interlaces the whole cell and that delimits compartmental reaction rooms. One such space is the site(s) of protein synthesis; polyribosomes are attached to this type of ER, which is referred to as rough endoplasmic reticulum. Other ER has no ribosomes and is referred to as smooth endoplasmic reticulum.

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