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Hormone
Definition:
A chemical messenger molecule secreted (i.e., released) by endocrine cells within endocrine glands.

By definition, a hormone molecule is released into the bloodstream and travels throughout the body to find its target cells. Teget cells may be within the intravascular compartment (i.e., within blood vessels), but most hormones have target cells in tissues outside of the blood vessels.

Related glossary terms/phrases:
Endocrine cell
Endocrine gland






Posted: Friday, July 26, 2013
Last updated: Sunday, July 28, 2013