Human Nervous System <br />Classification of Human Nervous System <br />1. Central Nervous System <br />2. Peripheral Nervous System <br />Chemical Coordination <br />Hormones <br />They are organic compounds of varing structural complexity <br />Chemical Classification of Hormones <br />there are four types of chemical hormones <br />Proteins <br />Amino Acids and Derivatives <br />Polypeptides <br />Steroids <br />Coordination and Control <br />Chapter No.17 <br />Biology <br />Part 2
