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A chemical messenger that signals to specific cells to change their behavior in specific ways. Hormones are secreted into the [[bloodstream]] through endocrine [[gland]]s, part of the [[endocrine system]]. Ensuing are a few significant examples:
A chemical messenger that signals to specific cells to change their behavior in specific ways. Hormones are secreted into the [[bloodstream]] through endocrine [[gland]]s, part of the [[endocrine system]]. Ensuing are a few significant examples:
1)Oestrogen from the [[ovaries]], which induces developement of secondary female characteristics during puberty and development of [[uterine]] lining follwing menstruation.
1) Oestrogen from the [[ovaries]], which induces development of secondary female characteristics during puberty and development of [[uterine]] lining following menstruation.
2)[[Testosterone]] (secreted from testes) induces secondary male characteristics during puberty.
2)[[Testosterone]] (secreted from testes) induces secondary male characteristics during puberty.