endoplasmic reticulum
Organelle means little organ. The cell can be thought of as an entire whole (just as you are) and have organs (as do you). There are several of these including the nucleus, mitochondria, rough ER, smooth ER and the Golgi found I animals.
ER
They are rough ER.Other ER with no ribosomes are smooth ER
Yes, the ER or endoplasmic reticulum is a membrane-bound organelle.
ribosomes
smooth ER
rough ER
Smooth ER
Yes, the endoplasmic reticulum (ER) is an organelle found in eukaryotic cells. It plays a key role in protein and lipid synthesis, as well as in detoxification and storage of calcium ions. The two types of ER are rough ER (with ribosomes attached) and smooth ER (no ribosomes).
If you don't have an ER your ribosomes will float around in your cytoplasm and your cells will not be healthy and die. An ER is like a mini highway for your ribosomes move on to get from organelle to organelle.
The endoplasmic reticulum (ER) is the organelle responsible for synthesizing fats and proteins in the cell. There are two types of ER - rough ER, which is studded with ribosomes and involved in protein synthesis, and smooth ER, which is responsible for lipid (fat) synthesis.
rough er, smooth er, Golgi apparatus