In the nervous system, electrical impulses carry messages to different organs of the body. The endocrine system uses hormones, chemical signals, to carry commands to the destined organs and cells
The endocrine system is a messenger system comprising feedback loops of the hormones released by internal glands of an organism directly into the circulatory system, regulating distant target organs. In vertebrates, the hypothalamus is the neural control center for all endocrine systems.
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