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Examveda

The size of the pupil is controlled by the

A. Retina

B. Iris

C. Cornea

D. Lens

Answer: Option B

Solution(By Examveda Team)

The size of the pupil is controlled by the activities of two muscles: the circumferential sphincter muscle found in the margin of the iris, innervated by the parasympathetic nervous system: and the iris dilator muscle, running radially from the iris root to the peripheral border of the sphincter.

This Question Belongs to General Knowledge >> Biology

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