The Endoplasmic Reticulum is like the flight attendant. Because the ER transports materials around the cell and the flight attendant transports materials around the airplane.
Cellular Respiration is like the gasoline that fuels an airplane because cellular respiration is how a cell gets energy and gasoline is how an airplane gets its energy.
The cell membrane is like the doors on a airplane because the cell membrane lets things in and out of the cell and the doors on an airplane let people and luggage in and out of the airplane.
The lysosomes is like the bathroom on an airplane because the lysosomes gets rid of things the cell doesn't need and the bathroom on an airplane gets rid of the passengers, as well as the crew on the airplanes waste.