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Hormones are chemical substance which are secrted by endocrine glands in small quantuty. They have slow reaction but it have prolonged effect. it is main sifinificanes is that i help us to maintain body temp. , attainment of sexual chracter etc.
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Hormones are also known as chemical messengers and are secreted by endocrine glands or ductless glands. These hormones are secreted directly into the blood stream, they act on places far away from their place of origin.
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