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PUBLIC MARKS from googon with tag muscles

05 April 2007 18:45

Eyes

The iris, the colored portion of the eye, is made of flexible muscles, and the aperture in the center is known as the pupil. The iris muscles contract or expand to different light conditions and determine the size of the pupil. Heredity decides the color

eyes pupil light muscles lens iris portion eye expand colored

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PUBLIC MARKS from googon with tag muscles

05 April 2007 18:45

Eyes

googon's TAGS related to tag muscles