Define hormones and their role in our body? Why are they called chemical messengers [3 MARKS]

Each point: 1 Mark

1. Hormone is a chemical substance produced in the body that controls and regulates the activity of certain cells or organs. Hormones are carried by blood to various specific target sites within body.
2. They are essential for body but are secreted in very small quantities. To attain proper growth and development our body needs hormones.
3. They are called chemical messengers because they carry information from endocrine glands to various parts of the body.