ENDOPLASMIC RETICULAUM (ER)

• Endoplasmic reticulum is the one of the most important organelles of eukaryotic cell.
• It produce protein and lipids , process it and  transport it.

Structure

• The one end of endoplasmic reticulum is attached to the nucleus pores and another end is attached with cell membrane.

There are two tyes of endoplasmic reticulum:-

1. Rough endoplasmic reticulum (RER) :-Endoplasmic reticulum attached with ribosomes on it.
• It is for protein synthesis.
2. Smooth endoplasmic reticulum (SER) :-Endoplasmic reticulum without attached ribosomes.
• It is for secreting lipids.

• The ER is absent in Red blood cells of mammals.

Function

• Provide supporting skeletal framework of the cell.
• Provide pathway to transport nuclear material from one cell to another.

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