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Multiple Choice

Which eye structure produces aqueous humor?

Aqueous humor is produced by the ciliary body, specifically the ciliary epithelium on the ciliary processes. This secreted fluid fills the posterior chamber and then moves through the pupil into the anterior chamber, nourishing the cornea and lens and helping to maintain intraocular pressure. The other structures have different roles: the conjunctiva is a protective mucous membrane over the sclera and eyelids; the cornea is the transparent front layer that refracts light but does not secrete aqueous humor; the endothelium lines the inner surface of the cornea and helps keep corneal dehydration in check. So the ciliary body is the source of aqueous humor production.

Aqueous humor is produced by the ciliary body, specifically the ciliary epithelium on the ciliary processes. This secreted fluid fills the posterior chamber and then moves through the pupil into the anterior chamber, nourishing the cornea and lens and helping to maintain intraocular pressure. The other structures have different roles: the conjunctiva is a protective mucous membrane over the sclera and eyelids; the cornea is the transparent front layer that refracts light but does not secrete aqueous humor; the endothelium lines the inner surface of the cornea and helps keep corneal dehydration in check. So the ciliary body is the source of aqueous humor production.