The casing helps protect the film and other parts of the camera. It also keeps the camera from being damaged. It is made of plastic.
Here is the other part of the casing.
The shutter is the part that opens and closes between the lens when taking a picture. The shutter controls how much of the film is exposed to the light.
The job of the lens is to redirect the light that bounces off objects so that they form the original images.
A light sensitive emulsion on a plastic base that records images taken on the camera.
Gas Discharge Tube
If you look closely, you may be able to see the Gas discharge tube in the flash. The gas discharge tube is made of xenon gas. It has electrodes on each end and it also consists of a trigger plate. The trigger plate helps direct the flash light forward.