Thyroid gland and its hormones

The thyroid gland is a butterfly-shaped organ located in the base of your neck. It releases hormones that control metabolism-the way your body uses energy. The thyroid's hormones regulate vital body functions, including:
Breathing
Heart rate
Central and peripheral nervous systems
Body weight
Muscle strength
Menstrual cycles›
Body temperature
Cholesterol levels
How the Thyroid Gland Works
The thyroid is part of the endocrine system, which is made up of glands that produce, store, and release hormones into the bloodstream so the hormones can reach the body's cells. The thyroid gland uses iodine from the foods you eat to make two main hormones:
Triiodothyronine (T3)
Thyroxine (T4)
It is important that T3 and T4 levels are neither too high nor too low. Two glands in the brain-the hypothalamus and the pituitary communicate to maintain T3 and T4 balance.
The hypothalamus produces TSH Releasing Hormone (TRH) that signals the pituitary to tell the thyroid gland to produce more or less of T3 and T4 by either increasing or decreasing the release of a hormone called thyroid stimulating hormone (TSH).
When T3 and T4 levels are low in the blood, the pituitary gland releases more TSH to tell the thyroid gland to produce more thyroid hormones.
If T3 and T4 levels are high, the pituitary gland releases less TSH to the thyroid gland to slow production of these hormones.
#ThyroidGlandFunction

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