Examlex
Pineal Gland
A small endocrine gland in the brain involved in the regulation of sleep patterns through the secretion of melatonin.
Biological Clocks
Internal mechanisms in organisms that control the timing of biological functions and behaviors, helping to adapt to the day-night cycle.
Hormone
Chemical substances produced in the body that regulate and control the activity of certain cells or organs.
Circadian Rhythm
The internal body clock that regulates the 24-hour cycle of biological processes, including sleep-wake patterns.
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