Hormones

Hormones are chemical messengers secreted by endocrine glands and specific tissues. They reach distant organs and stimulate or inhibit the function. They play important role in carrying messages to the various organs. They form part of a signaling system.

Hormones are synthesized in one tissue, secreted in to blood, transported as mobile messengers .When they reach target tissue, they exhibit their actions. Defect in the secretion, function, metabolism can lead to various diseases.