Endocrine glands are distributed throughout the body and secrete chemical messengers – hormones, in response to an internal or external stimulus. The endocrine system acts through the synthesis and release of chemical messengers and is responsible for several functions of the organism, in a slower, but more durable way.Įndocrinology is the science that studies the internal secretions produced by endocrine glands. The nervous system is associated with electrical and chemical signals that are transmitted at high speed, resulting in rapid organic activities. Despite its complexity and its functionality, which is incredibly effective, the control of its basic functions is performed by only two systems: the nervous system and endocrine system. The animal body represents one of the more complex and perfect systems of nature.
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