The iris is a muscle that expands and contracts to control the amount of light that enters the eye.
(The iris; is; a muscle that expands and contracts to control the amount of light) (a muscle; expands; ) (a muscle; contracts; to control the amount of light) (a muscle; to control; the amount of light that enters the eye) (the amount of light; enters; the eye)
The iris a muscle a muscle a muscle the amount of light
is expands contracts to control enters
a muscle that expands and contracts to control the amount of light
to control the amount of light
the amount of light that enters the eye
the eye