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   ocr: HORMONES ORMONES are chemical In - animals, hormones coordinate H - messengers found in both plants activities such as growth and and animals. In plants, hormones are reproductive cycles. Animal hormones responsible for growth movements. are released by organs called endocrine glands and are carried all around the body by the blood. They normally work much more slowly than the nervous system, but their eflects last longer. For example, growth hormones produce changes that take place over years. Fight or flight When a cat: is frightened, the bormone epinepbrine prepares it to fight or run away. ...