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Endocrine system


Endocrine organ secrete hormones.
Hormones are chemicals which act as a messenger.
They travel from one part of the body to another part of the body, through the blood.
Some hormones are steroids.
Many students think that “steroids” are bad. That is incorrect.
Steroids occur naturally in all animals and plants, and they are necessary for the organism to survive.
What is bad is adding extra hormones to people, unless they are absolutely necessary for medical reason.


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