The Endocrine System

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The human body is composed of multiple different systems. Among those is the endocrine system, which are a group of glands in the male and female human body that discharge hormones directly into the bloodstream, that are then delivered to several organs. Hormones control a multitude of bodily functions and behaviors. A hormone (from Greek ὁρμή, "impetus") is a class of regulatory biochemicals that is produced in all multicellular organisms by glands, and transported by the circulatory system to a distant target organ to coordinate its physiology and behavior. Hormones serve as a major form of communication between different organs and tissues. Hormones regulate a variety of physiological and behavioral activities, including digestion,metabolism, respiration, tissue function, sensory perception, sleep, excretion, lactation, stress, growth and development, movement,reproduction, and mood. [1] Generally, only a small amount of hormone is required to alter cell metabolism.[2] Hormone formation may arise at localized clusters of specific cells known as endocrine glands, or at othe...

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