The endocrine system includes various glands in the body that are responsible for secreting hormones into the bloodstream. Hormones are chemical substances produced by the body that regulate certain functions of cells and organs. Hormones can regulate sleep, sex, growth, stress, huger, metabolism, etc.
They are both sources of energy. They are almost exactly the same however ATP-Adenosine Triphosphate has one more phosphate group than ADP-Adenosine Diphosphate.
