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Human BodySurprise 4/5Difficulty 3/5Reviewed on September 14, 2026

The pituitary gland is the largest gland in the human body.

Why it is true

The pituitary gland is the size of a pea, about 1 centimetre in diameter and 0.5 grams. Despite its tiny size, it controls hormone production in other glands and is considered the master gland of the body.

Source: Journal of Anatomy

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