The area of physiology dealing with the production and effects of hormones.

Endocrinology is the study of the various hormones and their actions and disorders. Many organ systems may secrete and/or responds to hormones (e.g., the brain, lungs, heart, intestine, skin and the kidney), the clinical specialty of endocrinology focuses primarily on the endocrine organs, namely those organs whose primary function is hormone secretion. These organs include the pituitary, thyroid, adrenals, ovaries, testes, and pancreas.

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