Changes

'''Endoplasmic reticulum''' ('''ER''') is a cellular [[organelle]]. It is the transport network for molecules going to specific places, as compared to molecules that float freely in the [[cytoplasm]]. The endoplasmic reticulum is in cells that have a [[nucleus]]: in [[eukaryote]] cells but not in [[prokaryote]] cells. It takes these forms:

'''Endoplasmic reticulum''' ('''ER''') is a cellular [[organelle]]. It is the transport network for molecules going to specific places, as compared to molecules that float freely in the [[cytoplasm]]. The endoplasmic reticulum is in cells that have a [[nucleus]]: in [[eukaryote]] cells but not in [[prokaryote]] cells. It takes these forms:

*'''Rough endoplasmic reticulum''' ('''RER''') Monkey, so called because it is studded with [[ribosome]]s, and secretes [[protein]]s into the cytoplasm.  

*'''Rough endoplasmic reticulum''' ('''RER'''), so called because it is studded with [[ribosome]]s, and secretes [[protein]]s into the cytoplasm.  

*'''Smooth endoplasmic reticulum''' ('''SER'''). Among its functions is the production of proteins and [[steroids]], the maintenance of [[Membrane#Plasma Membranes|plasma membranes]], and a pathway for molecules to move along.

*'''Smooth endoplasmic reticulum''' ('''SER'''). Among its functions is the production of proteins and [[steroids]], the maintenance of [[Membrane#Plasma Membranes|plasma membranes]], and a pathway for molecules to move along.