Nictitating Membrane

A fold of the mucous membrane of the CONJUNCTIVA in many animals. At rest, it is hidden in the medial canthus. It can extend to cover part or all of the cornea to help clean the CORNEA.

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Tree Number(s): A13.660

MeSH Unique ID: D009541

Entry Terms:

• Membrane, Nictitating
• Membranes, Nictitating
• Nictitating Membranes
• Third Eyelid
• Eyelids, Third
• Eyelid, Third
• Third Eyelids

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Anatomy Category
Animal Structures
Nictitating Membrane