the Endocrine system releases chemicals into the body causing and last longer than nervous system signals. placed all around the body these organs pump chemicals continuously based on whats going on around you.
Medical Significance Of Hormones In The Endocrine System: Their Metabolism, Actions And Receptors
Hypothyroidism Revolution - Great infographic on the thyroid, endocrine system, and hormone regulation from Functional Longevity Institute. - Thyrotropin levels and risk of fatal coronary heart disease: the HUNT study.