Rough Endoplasmic reticulum

Rough endoplasmic reticulum has attached ribosomes

The proteins made in ribosomes are often sent into the rough ER, which plays an important role in the synthesis and packing of proteins

Found in all eukaryotic cells (plant and animal)

http://www.biology4kids.com/files/cell_er.html
http://endoplasretic.blogspot.com/2011/10/how-does-rough-endoplasmic-reticulum.html