6. Endocrinology: Hypothyroidism - 2nd Year MBBS
Channel: Cool Concepts in Physiology, Anatomy (& Life)
Date: 2023-04-01

Thyroid hormones are synthesized and secreted by epithelial cells of the thyroid gland. They have effects on virtually every organ system in the body including those involved in normal growth and development. The thyroid gland was the first of the endocrine organs to be described by a deficiency disorder. In 1850, patients without thyroid glands were described as having a form of mental and growth retardation called cretinism. In 1891, such patients were treated by administering crude thyroid extracts (i.e., hormone replacement therapy). Disorders of thyroid deficiency and excess are among 
the most common of the endocrinopathies (disorders of the endocrine glands), affecting 4% to 5% of the population in the United States and an even greater percentage of people in regions of the world where 
there is iodine deficiency.

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#CoolConceptsinPhysiology endocrine system anatomy and physiology, endocrinology, endocrine physiology, endocrine system physiology, mechanism of hormone action, endocrine