The nucleus is compared to the school principal as it is in charge of what occurs in the cell. The ribosomes are like the vice-principal as they take orders from the principal and help run processes. The endoplasmic reticulum is likened to classrooms where work gets completed, while the Golgi apparatus is the teacher that helps processes finish. Lysosomes act as the janitor to remove waste, and the nuclear envelope allows materials to move in and out like the school's main office.