Why are most ribosomes located on the channels of the endoplasmic reticulum?

Proteins synthesized by ribosomes located on the channels of the endoplasmic reticulum are immediately transported to the place where they are needed.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.