The ovaries are what produce estrogen and progesterone
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Opioids differentiate from other doctor prescribed medication because opioids are a very addicting drug.
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The Excretory system is responsible for the elimination of wastes produced by homeostasis. There are several parts of the body that are involved in this process, such as sweat glands, the liver, the lungs and the kidney system. Every human has two kidneys.
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