Hyperthyroidism

Two iodine-containing hormones called thyroxine (T4) and triiodothyronine (T3). They help regulate the body's metabolism and calcium balance.

A two-lobed gland located in the front of the neck below the larynx (voice box). It secretes hormones that help regulate the body's metabolism and calcium balance.

A state of being, like being healthy or fit, or having a problem, such as a heart problem.

Any organ or tissue that secretes fluids, such as hormones, for use elsewhere in the body or as waste.