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from Wikipedia, the free encyclopedia

Endocrine system

The endocrine system is a control system of ductless glands that secrete chemical messengers called hormones that circulate within the body via the bloodstream to affect distant organs.

Hormones act as "messengers", and are carried by the bloodstream to different cells in the body, which interpret these messages and act on them.

Note:   The above text is excerpted from the Wikipedia article "Endocrine system", which has been released under the GNU Free Documentation License.
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July 30, 2015

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