Hormones of the endocrine system are a vast topic with numerous hormones involved, affecting virtually every organ in the human body. Human physiologic processes such as homeostasis, metabolic demand, development, and reproduction are all possible because of hormones and the processes mediated by their actions. This review elaborates on the organs that secret the specific hormone, the actions of the hormone, and where these actions occur. Also, it reviews several of the most common endocrine diseases involving hormones. The number of diseases covered is not comprehensive due to the extensive number of diseases and ongoing research in this area. Understanding the physiology of hormones and how they result in pathological conditions is important.
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