Two organ systems are dedicated to internal coordination, communication between other systems and maintaining overall homeostasis. They are the endocrine system which communicates by means of hormones and the nervous system which sends quick electrical and chemical messages from cell to cell.
Endocrine system is a communication system that uses feedback loops to control distant target organs by controlling hormones secreted by internal glands of an organism directly into the circulatory system. All endocrine systems in vertebrates are controlled neurally by the hypothalamus.
The brain, spinal cord, and a sophisticated nerve network are all parts of the nervous system. The brain and the body are communicated with via this system. All bodily functions are managed by the brain. From the brain, the spinal cord descends via the back.m cell to cell.
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