What structure is the arrow pointing to?
Correct. The ciliary body connects to the iris. It is composed of smooth muscle and secretory epithelium. The secretory epithelium produces aqueous fluid; the muscle controls accommodation. When the ciliary muscle contracts, the zonules loosen, decreasing tension on the lens. With decreased tension, the lens becomes rounder and a more potent refracting element.
Incorrect. The sclera lies exterior to the indicated structure. Try again!
Incorrect. The choroid is a vascular layer that nourishes the outer retina. The indicated structure plays an important role in accommodation. Try again!
Incorrect. The retina does not exist in this portion of the eye. Try again!