Rough Endoplasmic Reticulum: This is another type of endoplasmic reticulum that is covered in ribosomes. It plays a role in protein synthesis.
Golgi Apparatus: The Golgi apparatus receives proteins and lipids from the rough endoplasmic reticulum, modifies them, and packages them into vesicles for transport within or outside the cell.
Lipid Synthesis: The process by which lipids (fats) are produced within cells. It occurs mainly in the smooth endoplasmic reticulum.