Structure:

- A cell has a cell membrane, which is like the car's body. The cell membrane protects the cell's contents and regulates what enters and exits the cell. The car's body protects the engine, passengers, and other parts of the car, and it also regulates the flow of air and other substances in and out of the car.

- A cell has a nucleus, which is like the car's engine. The nucleus contains the cell's DNA, which is like the car's blueprint. The DNA controls all of the cell's activities, just like the engine controls all of the car's functions.

- A cell has mitochondria, which are like the car's power plants. Mitochondria produce energy for the cell, just like the power plant generates power for the car.

- A cell has ribosomes, which are like the car's factories. Ribosomes produce proteins, which are essential for the cell's function, just like factories produce parts that are essential for the car's operation.

- A cell has an endoplasmic reticulum, which is like the car's transportation system. The endoplasmic reticulum transports materials within the cell, just like the transportation system moves people and goods within a city.

- A cell has a Golgi apparatus, which is like the car's post office. The Golgi apparatus packages and sends materials to different parts of the cell, just like the post office sorts and delivers mail.

- A cell has lysosomes, which are like the car's garbage disposals. Lysosomes break down waste products, just like the garbage disposal breaks down food scraps.

Function:

- Cells take in nutrients from their surroundings, just like cars take in fuel from their surroundings.

- Cells use energy to perform their functions, just like cars use energy to move.

- Cells reproduce, just like cars can be reproduced.

- Cells die, just like cars can die.