Thyroid

Definition

The thyroid is a butterfly-shaped gland located in the neck that produces hormones, primarily thyroxine (T4) and triiodothyronine (T3), which regulate the body's metabolic rate as well as heart and digestive function, muscle control, brain development, mood, and bone maintenance.

Related terms

Endocrine System:

This is the collection of glands that produce hormones that regulate metabolism, growth and development, tissue function, sexual function, reproduction, sleep and mood among other things.

Hypothyroidism: This is a condition where the thyroid does not produce enough hormones causing fatigue, weight gain and depression among other symptoms.

Hyperthyroidism: This is a condition where the thyroid produces too much hormone leading to rapid heartbeat, weight loss and nervousness among other symptoms.