The rover's "body"
The rover body is called the warm electronics box, or "WEB" for short. Like a car body, the rover body is a strong, outer layer that protects the rover's computer and electronics (which are basically the equivalent of the rover's brains and heart). The rover body thus keeps the rover's vital organs protected and temperature-controlled.
The warm electronics box is closed on the top by a piece called the Rover Equipment Deck (RED). The Rover Equipment Deck makes the rover like a convertible car, allowing a place for the rover mast and cameras to sit out in the Martian air, taking pictures and clearly observing the martian terrain as it travels.
NASA's Curiosity Rover in Profile
About the size of a small SUV, NASA's Curiosity rover is well equipped for a tour of Gale Crater on Mars.
Three Generations of Rovers with Engineers
Three generations of Mars rovers with engineers in the Mars Yard testing area of NASA's Jet Propulsion Laboratory.