Caption:Close inspection of the nuclear envelope and endoplasmic reticulum shows the nuclear pores through the nuclear envelope. In many cells, the surface of the endoplasmic reticulum is coated with ribosomes actively engaging in protein synthesis.
Notes:The intimate connection between the site of production of mRNA (nucleus) and the site of mRNA translation (ribosomes on the endoplasmic reticulum) through the nucear pores is apparent in this model.