Yes and no. It may be in some companies and in others they may have an audio/visual department.
A viewfinder is a part to a camera.
Tiny Camera Part, Pandora's box. Please see the Related link below for a walkthrough of Camera.
The shutter.
it is a part of the camera
CCD Sensor (in a digital camera) = Retina
The focusing lens of the camera
The iris is like the aperture part of a camera, which used to also be called the iris.
I am really not that sure.
The lens.
the lens
the part of an image closest to the camera
the part of an image closest to the camera