Major objective of this lecture is to presentation on Endocrine System Overview. Here compare the basic organization and function of the ES and the NS and describe the structural and functional organization of the hypothalamus and the pituitary and explain their relationship. Here also discuss the locations and structures of the thyroid, parathyroid, and adrenal glands as well as the thymus and the endocrine part of the pancreas. Finally analysis list the hormones and their function produced by these glands and analysis review the results of abnormal hormone production.