How are the ciliary muscle fibers oriented histologically?

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Multiple Choice

How are the ciliary muscle fibers oriented histologically?

Explanation:
Histologically, the ciliary muscle is smooth muscle organized in more than one orientation. It contains longitudinal (meridional) fibers that run from the scleral spur toward the ora serrata, and circular fibers that form a ring around the ciliary body near the iris. This dual arrangement lets the muscle contract in different directions to alter zonular tension and lens shape for accommodation. That’s why the best description is a combination of longitudinal and circular smooth muscle fibers. A single orientation or a random pattern wouldn’t accurately describe the organized layering seen in the ciliary muscle.

Histologically, the ciliary muscle is smooth muscle organized in more than one orientation. It contains longitudinal (meridional) fibers that run from the scleral spur toward the ora serrata, and circular fibers that form a ring around the ciliary body near the iris. This dual arrangement lets the muscle contract in different directions to alter zonular tension and lens shape for accommodation. That’s why the best description is a combination of longitudinal and circular smooth muscle fibers. A single orientation or a random pattern wouldn’t accurately describe the organized layering seen in the ciliary muscle.

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