The Thyroid Glands
The thyroid gland consists of two masses astride the upper end of the trachea. The vascular supply to this gland is exceptionally rich, i.e. it receives four times as much blood as do the kidneys. Thyroid gland is essentially an energy-regulating organ and its output controls the rate of metabolism or the speed of living; also it aids digestion, combats the poison in the body, gives balance to the brain, regulates protein, carbohydrate and fat metabolism and cures and prevents goitre.(See fig. III).
The Parathyroid Gland
The Parathyroid glands are four minute ovoid bodies embedded in the lobes of the thyroid glands. (See fig. III).