Question

What does the endoplasmic reticulum look like?

Answer 1

The endoplasmic reticulum looks like a system with membranes that form cavities, flat cisterns and non-lamellar, round structures.
It can contain ribosomes and than we call it `->` rough endoplasmic reticulum
When the ER has no ribosomes it is called `->` the smooth endoplasmic reticulum

Explanation:

Endoplasmic reticulum is a system of intracellular membranes that produce and transport substances. It is a system of flat cavities or cisterns. There are two types of ER: rough and smooth. The rough endoplasmic reticulum contains ribosomes on its edges where protein synthesis takes place. The smooth endoplasmic reticulum does not have ribosomes on its surface and participates in lipid synthesis, destroys poisons, and under the influence of the sun it can convert cholesterol into vitamin D. On its surface there are no ribosomes. When we break the ER in a laboratory, during the homogenization process, we get microsomes.