Tears - Definition

April 2017


Definition


Tears are drops of lacrimal fluid which fall from the eye through two puncta located in the inner part of the eye, on the upper eyelid and the lower eyelid. The lacrimal glands, located above each eye, produce tears, a solution mainly composed of water, but also of sodium chloride, which gives a salty taste to tears. Tears have, among other roles, that of moistening the eye, but also of protecting the cornea by removing any external agent found in the eye. They can also be the consequence of strong emotion: fear, joy, sadness, and pain.

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Published by Jeff. Latest update on December 11, 2013 at 04:52 AM by Jeff.
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