what are the different parts and functions of a microscope?
['Eyepiece Lens: the lens at the top that you look through. ... ', 'Tube: Connects the eyepiece to the objective lenses.', 'Arm: Supports the tube and connects it to the base.', 'Base: The bottom of the microscope, used for support.', 'Illuminator: A steady light source used in place of a mirror.']