The vascular tissue lining the inner surface of the eye beneath the retina, which provides nutrition to the retinal pigment epithelium, is the
a. aqueous humor. c. vitreous humor.
b. choroid. d. zonules.
B
The pigmented, middle, vascular tunic, or uveal layer, is composed of the choroid, the ciliary body, and the iris. The choroid is a vascular tissue that lines the inner surface of the eye just beneath the retina. It provides nutrition to the retinal pigment epithelium and helps absorb excess light. The central cavity of the eye posterior to the lens is filled with a clear, gelatinous material called vitreous humor, which helps maintain the shape of the eye. The anterior chamber is posterior to the cornea and in front of the iris and lens. It contains the aqueous humor that is produced by the ciliary body. Zonules are small strands of tissue extending from the ciliary body to the lens; they hold the lens in place.
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