Human Endocrine System

Progesterone, testosterone and eostrogen are the hormones of gonads but the adrenalin is the hormone of adrenal medulla.

Tetany is a spasm and twitching of the muscles, particularly those of the face, hands, and feet. Tetany is usually caused by a reduction in the blood calcium level, which may be due to underactive parathyroid glands (hypoparathyroidism).