Abstract
Although hormones differ in their place of origin, order of distribution, chemical composition and nature of action, they are united under a very important general biological pattern: they participate in metabolism, morphological differentiation of the organism, growth and development, reproduction and regulation and coordination of its basic functions. The nervous system carries out the connection and influence between different parts of the organism directly through hormones. Hormones are substances of a protein nature or steroids that act in extremely small quantities. Their effect is carried out in 2 ways: through the nervous system and directly through the blood to the organs.
Published Version
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