Now, the smoothie R contains folds that are slightly more tubular than the folds on the rough Er. And this can be seen from this picture here. Now, unlike the rough Er, the smooth Er does not contain ribosomes embedded in the membrane. And that's exactly why we call it the smooth Er. Now, since it doesn't contain any ribosomes inside our membrane, that means the smooth Er is not directly involved in synthesizing our proteins. However, it does contain some very important enzymes that are basically involved in creating glucose.