Pineal gland
In human, the pineal gland or epiphysis cerebri or
conarium is located behind the third ventricle of brain and is formed of
parenchymal cells and interstitial cells. It secretes the hormone, melatonin, which plays a central role
in the regulation of circadian rhythm of our body and maintains the normal
sleep wake cycle. It also regulates the timing of sexual maturation of gonads.
In addition melatonin also influences metabolism, pigmentation, menstrual cycle
and defence mechanism of our body.
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