This picture depicts the shutter, flash circuit, the lens and the inside of the casing. The casing is the outer part of the camera and protects the camera from damage and from light trying to reach the film. The shutter is there to open and close the compartment where the film is stored to capture the image. The lens slows the light down and bends it in order to take a good picture. The flash circuit is a short flash of light to illuminate a room that doesn't have enough light to take a picture. We can also see the gas discharge tube. This area is filled with exon gas that helps take the picture.
Here we can see the film. The film is the roll of special material that is very light sensitive. It captures the light from out side and takes the picture. The film can be developed in order to see the picture you took.