endoplasmic reticulum lumen (GO:0005788)

The volume enclosed by the membranes of the endoplasmic reticulum

Specific

rough endoplasmic reticulum lumen (GO:0048237) sarcoplasmic reticulum lumen (GO:0033018) smooth endoplasmic reticulum lumen (GO:0048238)

General

intracellular organelle lumen (GO:0070013) endoplasmic reticulum part (GO:0044432)

References

gene ontology: GO:0005788