A NUMBER OF OTHER ORGANS AND TISSUES PRODUCE HORMONES IN ADDITION TO THERE USUAL FUNCTIONS. 

THESE HORMONES HAVE VERY IMPORTANT ROLES IN THE INTEGRATION OF BODY PROCESSES.

 

A NUMBER OF OTHER CELL PRODUCTS ARE ALSO CHEMICAL MESSENGERS BUT ARE NOT HORMONES.  WE WILL DISCUSS THEM HERE EVEN THOUGH THEY ARE MAINLY LOCAL MESSENGERS