aqueous humor

aqueous humor

noun Anatomy.
the limpid watery fluid that fills the space between the cornea and the crystalline lens in the eye.

Origin:
1635–45

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

aqueous humor n.
The clear, watery fluid circulating in the chamber of the eye between the cornea and the lens.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
aqueous humor  
The clear, watery fluid that fills the chamber of the eye between the cornea and the lens.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

aqueous humor

optically clear, slightly alkaline liquid that occupies the anterior and posterior chambers of the eye (the space in front of the iris and lens and the ringlike space encircling the lens). The aqueous humour resembles blood plasma in composition but contains less protein and glucose and more lactic acid and ascorbic acid. It provides these nutrients (as well as oxygen) to eye tissues that lack a direct blood supply (such as the lens) and also removes their waste products. In addition, it provides an internal pressure, known as intraocular pressure, that keeps the eyeball (globe) properly formed. Aqueous humour is formed from the blood by filtration, secretion, and diffusion through the ciliary body, a muscular structure located behind the iris that controls the curvature of the lens. Aqueous humour leaves the eye through the porous trabecular meshwork and flows into Schlemm's canal, a ringlike passageway around the outer angle of the anterior chamber in front of the iris. From the canal the liquid enters the veins

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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