Chapter 13 : Hormones

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13.1 What are hormones ?

Hormones are chemical substances produced in minute quantities by an ENDOCRINE GLAND. It is transported in the bloodstream to target organ(s) where it exerts its effects. After hormones have performed their functions , they are eventually destroyed by the liver.

Affecting factor that can influence growth, development and activity of an organism.

Chemical messengers that help various parts of body to respond, develop and work together smoothly.