Role of Hormones in our body

1. Put simply, hormones are the body's little messengers, which get produced in one part of the body, such as the thyroid, adrenal or pituitary gland, pass into the bloodstream or other body fluid, and go to distant organs and tissues where they act to modify structures and functions.
2. http://study.com/academy/lesson/hormones-definition-function-intro-to-the-endocrine-system.html
3. http://www.enotes.com/homework-help/what-hormones-what-do-they-do-394376
4. https://en.wikipedia.org/wiki/Hormone
5. http://www.endocrinesurgeon.co.uk/index.php/what-are-the-functions-of-the-different-types-of-hormone