The Body of the Plane
The body of the plane is what weighs the most, and so the other parts of the plane are created to keep this part of the plane aloft and traveling. The body can weigh anywhere from under a hundred pounds to well over 5 tons, as it is what contains the mechanics of the planes as well as any cargo and supplies the planes may be carrrying. In commercial planes, most body space is devoted to passengers and products, though a large chunk is donated to the storage and containment of fuel, allowing for the plane to do all of the nessecary taks to keep transporting the goods it is carrying. On most planes, the body is airlocked, to prevent catastrophic loss of oxygen or pressure. If this was to occur (You have probably seen this happen during an action or spy movie) all the contents of the plane could be crushed or sucked out of the plane. The body of the plane has the most safety features, as thats were people are most likely to be, including but not limited to oxygen masks, special sensors, flotation devices, and numerous detecters for things like smoke or carbon monoxide. The body of a plane usually stays in one piece during a crash, thanks to the extensive research put into the safety of this part of the plane. It is usally made of a special aviation grade metal, allowing for the perfect traits to be used for flight, be it internationally, between states, or even just from city to city.