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'''Endocrine''' is an adjective used to describe a number of chemicals and organs/tissues in living organisms. Endocrine organs or tissues release chemicals (called [[hormones]]) that enter the bloodstream and act on target cells far away from the hormone-producing cell, thereby changing the behavior of the target cell. This is in contrast to other hormone-producing cells which may release chemical signals only into their immediate environment, thereby affecting only local cells.
Examples of endocrine glands and their associated hormones in humans include the [[thyroid]] gland ([[thyroxine]]), the [[pancreas]] ([[glucagon]] and [[insulin]]), [[adrenal glands]] ([[adrenaline]] and [[cortisol]]), [[testes]] ([[testosterone]]), and [[ovaries]] ([[estrogen]] and [[progesterone]]).