Which fluid is produced by the ciliary body to nourish the cornea and lens?

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Multiple Choice

Which fluid is produced by the ciliary body to nourish the cornea and lens?

The key idea is that the ciliary body produces a nourishing fluid for the eye’s avascular structures. The ciliary processes secrete aqueous humor, a clear fluid that fills the space in front of the lens. It nourishes the cornea and lens, which lack their own blood vessels, by delivering nutrients and removing wastes. The aqueous humor flows from the posterior chamber through the pupil into the anterior chamber and is drained to maintain eye pressure. Vitreous humor sits behind the lens in the large posterior segment; it’s a gel-like substance formed largely before birth and isn’t produced by the ciliary body. The retinal pigment epithelium is a cellular layer in the retina, not a fluid. The optic nerve is neural tissue, not a body fluid.

The key idea is that the ciliary body produces a nourishing fluid for the eye’s avascular structures. The ciliary processes secrete aqueous humor, a clear fluid that fills the space in front of the lens. It nourishes the cornea and lens, which lack their own blood vessels, by delivering nutrients and removing wastes. The aqueous humor flows from the posterior chamber through the pupil into the anterior chamber and is drained to maintain eye pressure.

Vitreous humor sits behind the lens in the large posterior segment; it’s a gel-like substance formed largely before birth and isn’t produced by the ciliary body. The retinal pigment epithelium is a cellular layer in the retina, not a fluid. The optic nerve is neural tissue, not a body fluid.

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