First World War erupts Four days after Austria-Hungary declared war on Serbia, Germany and Russia declare war against each other, France orders a general mobilization, and the first German army units cross into Luxembourg in preparation for the German invasion of France.
The endoplasmic reticulum (ER) is a series of interconnected membranes or flattened sacs adjacent and connected to the nuclear membrane. The ER comes in two different morphological forms: smooth endoplasmic reticulum (sER) and rough endoplasmic reticulum (rER). The primary function of the sER is to serve as a platform for the synthesis of lipids (fats), carbohydrate (sugars) metabolism , and the detoxification of drugs and other toxins.
It looks smooth as compared to rer, because it do not contain ribosomes. It helps in the manufacture of fat molecules& lipids. Rer- It is known as rough endoplasmic recticulum. It is visible as rough due to the presence of ribosomes. Rer helps in the membrane biogenesis as ribosomes are attached to it which syntesis proteins.