Hormonal Endocrine System consists of a series of glands that produce and secrete hormones that the body uses for a wide range of functions. These control many different bodily functions, including: Respiration. Metabolism. Reproduction. Sensory perception, Growth Regulation. Hormones are the messengers to these various organs for them to function optimally. When this system is thrown out of balance some of the symptoms you will notice are; irritability, anxiety, increased reactions to stress, weight problems, difficulty thinking, being irrational and chronic fatigue.