The functions of Endoplasmic Reticulum are:
1. Provides mechanical support. Acts as cytoskeleton and keep cell organelles in position.
2. Rough Endoplasmic Reticulum(RER) is the site of secretion of secretory proteins.
3. Means of intracellular transport
4. Plays an important role in various metabolic activities.
5. Gives rise to primary lysosome
6. Glycogen synthesis and storage
7. Synthesis of cholesterol and steroid hormones
8. Formation of microbodies
9. Controls movement of various substances between two adjacent cells through plasmodesmata.
10. Membrane flow.
