Hormones are the chemical substances which coordinate the activities of living organisms and also their growth.
General Characterstics of hormones are :
1. They are secreted through Endocrine glands
2. They act as a chemical messengers.
3. They are the chemical signals that circulate into the body fluids.
4. Unlike enzymes do not catalyze any reaction.
5. They only regulate the behavior of the target cells.