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Microscopic sphincter

microscopic sphincter

A sphincter visible only under the microscope.

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... muscles that dilate (widen) and constrict (narrow) the pupil size. The sphincter muscle lies around the very edge of the pupil. In bright light, ... from the back of the eye (posterior chamber). Its color comes from microscopic pigment cells called melanin. The color, texture, and patterns ...

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by Dr.Stein
Mon Dec 12, 2005 8:29 am
Forum: Human Biology
Topic: eye
Replies: 11
Views: 7221

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