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What Is the Structure That Controls the Size of the Pupil

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What is the structure that controls the size of the pupil


Definitions:

Relaxin

A hormone involved in pregnancy, childbirth, and menstruation, known for its ability to relax muscles and ligaments.

Connective Tissue

A type of body tissue that supports, protects, and gives structure to other tissues and organs in the body.

Ovaries

Female reproductive organs that produce ova (eggs) and secrete hormones such as estrogen and progesterone.

Calcitonin

A hormone produced by the thyroid gland that lowers blood calcium levels by inhibiting bone resorption.

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