Casing - The casing of the camera keeps all the components of the camera safe and functioning, and also keeps them in place.
Shutter - The shutter opens and closes to expose light to the film. It controls the amount of light exposed.
Lens - The lens refracts light so that the light capture the whole image onto the film.
Film - Captures the light that was refracted by the lens on the surface of the film. Only the film exposed to light.
Flash Circuit - Creates bright flash of light