CHEMICAL COORDINATION AND INTEGRATION https://www.facebook.com/sciencegajab/ visit for fb page CHEMICAL COORDINATION AND INTEGRATION IN LIVING ORGANISMS ARE PRIMARILY DONE BY ENDOCRINE GLANDS HORMONES ARE • Non-nutrients chemicals • Intercellular messengers • Produced in trace amount. • Generally endocrine gland secretions are Hormones but some chemicals also considered as hormones which are not produced by endocrine glands. […]