the endocrine system is a chemical messenger system comprising feedback loops of the harmones 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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the endocrine system is a chemical messenger system comprising feedback loops of the harmones 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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